You may follow this information ( page 2 of this thread), and save some coin. They are listed on eBay for less than 100 bucks. The only drawback is that they are non-adjustable, whilst GAZ and QA-1 are.Here are the part number I got from Bilstein
The rears are from a C4 Corvette and the fronts from a Nissan Frontier. The rear shocks should be very close, but the fronts may have too much rebound. Bilstein suggested I give it a try and if needed Bilstein's can be re-valved. Bilstein can do this or some shops that revalve shocks can do this.
You can enter these part numbers into Ebay and find them for very good prices.
To use these as coil overs you need coilover kits from Bilstein or other seller on Ebay. The kit you use needs to be for a 2.5" diameter shock. Most of these kits require machining a groove into the shock body for a circlip that holds the threaded sleeve. You will also need springs. $2.5 ID springs are needed and can be found in any spring rate on Ebay for cheap. Not sure of the spring length needed and will try to get that info from Bilstein.
After checking some prices, you could put together a complete set for $500-$700