Nobody has one? This is the aluminum one piece that came in a lot of the V8 4th gens and was an option on some later third gens aswell. Must be straight, prefer good u joints but depends on price.
camerons cove you can have one made for around $200 and it's stronger then the 1-le. i broke one with only 300 rwhp and 18" dr's at stanton many years back. typically the used gm ones go on average for $125 but you can sometimes find them less. if your actually racing i'd want one built a little stronger but that's just my opinion and a little bit of helpful suggestion for you.
obviously a good source would be ls1tech and thirdgen.org
i have one aluminum driveshaft left. i was just about to put it on ebay when i saw your ad, its from a 91 trans am $80 and can be picked up in roseville mi.