I think these came from a 80s-90s A36. I had the tag from the removal, but I loaned these to a friend with an A36 who was sending his tip tanks for repair and he wanted to keep the a/c in service, and they didn't come back with the tag. As I recall, they were originally removed during a turbine conversion. The left wing has an access on top, presumably for a remote compass. $1,650 each or $3,200 for both.