Where to purcahse all after market parts?

ShuttleAstronaut608

Hello fellow wag-owners, this thread may already be somewhere in here but my incompitence made it impossible to find so I'm going to try and get some answers from you guys/gals. I'm trying to find some general bracing for the underside and interior, a rear wing for either the top/middle of the hatch and a good set of rear window blinds so if you guys could help me out and let me know the best place to find these parts would be awesome. My WAGO an '87 too by the way. If there is an existing thread to better help me, please let me know so this can be deleted. Thanks