I don't think your going to find such a thing listed anywhere. Your probably going to be limited to: (1.) Having some custom made (and costly) ones made from scratch, and (2.) Trying to see if S-10 2wd 4.3 headers will work.
I have the same car/drive train. The only thing I've come across so far is the link I'll copy/paste below. I haven't contacted him yet, so I can't offer any further information. The price looks to be in the $250.00 range. If you talk to him, please let me know what you think. I plan on emailing or calling sometime in the near future. I'd like to do some work on the car this winter, while it's parked, depending on what I can budget - perfect time to consider doing this!