A device (106, 700, 1000) for mounting a fixture onto a tubular structure of a vehicle, the device comprising an extended mounting member (400, 704, 1004) having an inner surface shaped to fit onto a span of the tubular structure along an outer surface of the tubular structure, wherein the inner surface of the extended mounting member (400, 704, 1004) is shaped to conform to the tubular structure and_is configured for contact with the span along an entire length of the extended mounting member (400, 704, 1004); and the extended mounting member (400, 704, 1004) has a flat outer mounting portion defining a plurality of attachment locations (300, 702, 1002) configured to mount the fixture to the flat outer portion; and a plurality of securing members (402, 706, 1006), wherein each securing member (402, 706, 1006) has an inner surface shaped to fit onto an outer surface of the tubular structure at a respective location along the extended mounting member (400, 704, 1004); and each securing member (402, 706, 1006) is configured to attach to the extended mounting member (400, 704, 1004) at the respective location such that the tubular structure is securely trapped between the securing member (402, 706, 1006) and the extended mounting member (400, 704, 1004), whereby the plurality of securing members (402, 706, 1006) are thereby configured to securely attach the extended mounting member (400, 704, 1004) to the tubular structure. an extended mounting member (400, 704, 1004) having an inner surface shaped to fit onto a span of the tubular structure along an outer surface of the tubular structure, wherein the inner surface of the extended mounting member (400, 704, 1004) is shaped to conform to the tubular structure and_is configured for contact with the span along an entire length of the extended mounting member (400, 704, 1004); and the extended mounting member (400, 704, 1004) has a flat outer mounting portion defining a plurality of attachment locations (300, 702, 1002) configured to mount the fixture to the flat outer portion; and the inner surface of the extended mounting member (400, 704, 1004) is shaped to conform to the tubular structure and_is configured for contact with the span along an entire length of the extended mounting member (400, 704, 1004); and the extended mounting member (400, 704, 1004) has a flat outer mounting portion defining a plurality of attachment locations (300, 702, 1002) configured to mount the fixture to the flat outer portion; and a plurality of securing members (402, 706, 1006), wherein each securing member (402, 706, 1006) has an inner surface shaped to fit onto an outer surface of the tubular structure at a respective location along the extended mounting member (400, 704, 1004); and each securing member (402, 706, 1006) is configured to attach to the extended mounting member (400, 704, 1004) at the respective location such that the tubular structure is securely trapped between the securing member (402, 706, 1006) and the extended mounting member (400, 704, 1004), whereby the plurality of securing members (402, 706, 1006) are thereby configured to securely attach the extended mounting member (400, 704, 1004) to the tubular structure. each securing member (402, 706, 1006) has an inner surface shaped to fit onto an outer surface of the tubular structure at a respective location along the extended mounting member (400, 704, 1004); and each securing member (402, 706, 1006) is configured to attach to the extended mounting member (400, 704, 1004) at the respective location such that the tubular structure is securely trapped between the securing member (402, 706, 1006) and the extended mounting member (400, 704, 1004), whereby the plurality of securing members (402, 706, 1006) are thereby configured to securely attach the extended mounting member (400, 704, 1004) to the tubular structure.