I may just do that - I didn't catch until now that you had indeed called them. But yeah, I just want the correct parts. (And part #'s, obviously.)
I believe (correct me if I'm wrong on this) that the same model year Tacoma OTREs is what I want for my 4Runners - e.g., I'd want 2000 Tacoma OTREs for my 2000 4Runner. Does that sound right?
'Course, I could just call them and say "Hey look - this is the ball joint part # I have; it's for a Tacoma ball joint that I'll be replacing my 4Runner ball joints with. I need the correct part # for the OTREs that will mount up to THIS ball joint."

I'll let you (you guys) know how it turns out. If anyone else has any advice feel free to drop it on me. LOL