I do have a waterproof box available to mount up to six of your own breakers in. The part number is 3113 You wont need a panel because the box includes a panel. It takes only flat rocker breakers in A or C Frame.
I dont have a box to offer you for the 8087 but you might be able to come up with a waterproof box at Home Depot. I do have a back panel, it is p/n 4027