GM parts at wholesale....
I went to my local Buick dealer and he agreed to sell me parts at wholesale. I explained that those parts are available at huge discounts on the web from some dealers to Buick club members. This is true, look at the vendor section at GNTTYPE.org for a long list of parts sources.
http://www.gnttype.org/vendors/index.html I found a person on that list who'd sell me an accumulator for $75-80 plus shipping.
I explained to the parts manager at my local Buick dealer that I wanted to support a local business if I could, rather than deal mail order. He said "yes" right away and I've purchased several parts in the last two years that way. I bought an accumulator for my 87 TR Ltd for about $75 or thereabouts.
You can call him, Buck Fischer Parts Manager, at 1-719-636-3881 and see what he can do. He told me that shipping a part out would be no problem. If I can help on this end here in Colorado Springs, let me know.

Just PM me and I'll do what I can for you.
A similar conversation with your local buick parts manager might yield the same results....Worth a try. Do it on the phone and sound like you're wearing a $1000 suit. A smart parts manager will cooperate with you.

Times are hard, any increase in volume will help the dealership's numbers.