Complex sentence: Although numerous examples of the VP-2 were constructed from plans provided by the Evans Aircraft Company, the VP-2 is no longer being offered with the company having stopped marketing the VP-2 and responding to technical inquiries.
Split into simpler sentences: Although numerous examples of the VP-2 were constructed from plans provided by the Evans Aircraft Company, the VP-2 is no longer being offered. The company has stopped marketing the VP-2 and responding to technical inquiries.