Quick search on s10forum didn't find me anything. Could you get a 2nd gen ('94+ ) S10 or Sonoma with the 4.3 Vortec AND a 5-speed? I've only seen a couple that had the V6 with a manual, and they were '94 or '95 with the 4.3 TBI, not the Vortec engine.
I've been looking at some late 90's S10 and Sonomas, and everything with a 4.3 is an automatic. WHY? Shit pisses me off...