Vintage Simmons Drums (UK) Users Group

Does anyone have any detailed pics of these? I'm looking to "reverse engineer" one and need to know how it is constructed. Not looking to reproduce them for resale or anything like that, rather just looking to reproduce a few for my own kit, in leau of finding the rare originals. The pics I've seen of them makes them look rather uncomplicated, and shouldn't be too bad to reproduce.

Opinions and any help or info is greatly appreciated.