The PO didn't do that, Trakka did. The external latches look like a PO mod. What is the problem with the top--the fiberglass or the metal drip rail? I had a Trakka like that (see it in the 45 series classifieds) and the PO cut up a good top to replace the drip rail. I had to drill all the rivets, fiberglass it properly, fix the metal and reassemble. It was quite a bit of work for never having done fiberglass, but it was certainly doable.
If you just don't want the camper, I bet another troopy owner in the states would be happy to trade you his top for yours.
BTW, how's the rig? A neighbor to the south (in Albuquerque) beat me to that one and imported it. Seems it's been sold a number of times since then (2008, I think). The last owner in AU was a kiwi and a panel beater. He did the body and paint himself, which looks like it's holding up fairly well.