I need help with a Dime wagon

Absolutely, Z support is something to be appreciated -- but 510 sources have been improving lately as interest and car values grow. Dave Patten at Futofab is doing a great job, also Baz at Datsport: http://datsport.com/  Australia has its own, very creative batch of 1600/Bluebird fanatics.

Quality replacement rubber pieces and odd little bits remain the challenge, but ebay and craigslist can help narrow the search. Repro parts coming out of Asia are hit-or-miss so try to get feedback from the forums mentioned earlier in this thread.