The Callaway DYMAG's were an option on 1987 B2K's in 2 different styles during that model run (16 & 17") In 1988, 17" Callaway DYMAG's became standard on ALL Twin Turbo B2K's and remained until 91 (when production issues, etc) Some 91's have OZ wheels...
Scarce, yes...
Don't be too amazed though... $8,000 bux is what more than a few sets have been advertised for however, I have yet to see a set sell. (I know of one good deal on those wheels that recently went through - NOT 8K!!! )
The similar "Style" 17" DYMAG's were avail. as well however, they said CORVETTE instead of CALLAWAY but visually looked the same. Those wheels were avail. NEW for about 1grand a wheel (once you bought the 88/89 vette center cap)
A set of those sold for about 2200 bux at Carlisle this Summer.
A 3rd style of 17" DYMAGS was avail from places like Mid America or "E.M." and were priced about the same as the Corvette DY's however, did not used a closed lug design.
...enjoy! *89x2*