Sourcing parts for my 89 burb?

[Will206]

There are a few things I am looking for was wondering if anyone knew where a good, affordable place to find this stuff might be.

1) Looking for the rubber bushings on the core support. I find a lot of these around the internet from 25 to 100 bucks and half the time they fit a broad range of models and don't look like mine. Which ones do I actually need, and should I just buy a complete body bushing kit from some place like Energy Suspension instead?

2) Window sweeps, I need the rubber/felt bits that go around the windows all the way around the truck, tailgate glass included.

3) Driver side battery tray. Does any place have these? I found one on ebay for like 100 bucks, which is simply too much. Used would be fine.