I came across this guy recently at a swap meet in Ohio. He had TONS of hard-to-find hardware- thought I'd pass it along if you are looking for just the right fastener for your Buick project. http://justclippsauto.com/ Good luck.
Website. http://www.justclippsauto.com/sampleboards.htm Thanks for the tip. I will be in need of clips and such down the road. :TU: