I have one or two of the red (goofy) "double closing loop/Y line" assemblies. Can't remember how it goes, or why it was so complicated, - but it - or they are somewhere in my loft. I used to pack these 'back in the day'.........Could put in an envelope and mail it to you.
I know a guy with two complete rigs that hasn't jumped for years. Probably in his attic somewhere. Maybe he'd sell you one