skidim.com has some
the supertraps have a ring that screws into the transom, the pipe fits into a lip on the ring, the threaded rod sticking out the end of the pipe fits thru the ring and the traps tighten it all together with a nut on the threads. if you had already taken the traps off, the rest would have pulled apart pretty easily. otherwise, it should have stayed attached thru the transom.
i've never owned a boat with the flapper-style but have read that the traps work better.