[V8] radio button spring problem

[getur at optonline.net]

Ran into an interesting problem with the V8 radio. 

The springs behind the push buttons on these delta and gamma radios periodically break down and require replacement. I've done this before and have ordered the return springs from midwesternelectric. They are a certified blaupunkt repair service center. Well a couple of weeks ago the fm button stopped returning to it's position whenever it was pressed and if I hit a good bump the radio will skip between the fm bands. I called midwesternelectric and tried to order a bunch of those return springs and they tell me that they are forbidden to sell them since they are oem. They tell me that since last year Audi has told them they can't sell any oem parts. I then tried to order the return springs from a local Audi dealer and they tell me that they don't have any part number for them. I have to get the radio repaired which will cost $125 since that is the cost of swapping the unit. 

This is obscene. Does anyone have another source for these return springs?

George Tur
91 V8