I was checking out Bob's Automobilia, and they have most, if not all colors listed for the buicks up to the 60's. I haven't bought any yet to know how close it matches but it may be the correct colors since he only deals in older buick stuff. So you might want to check out bobsautomobilia.com and see what you think. Just thought I would pass that along.
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John N.
'54 Buick Special 2dr
'47 Chevy Coupe
'70 Opel GT