Another option for you, look for a rear axle from a v6 2wd. I can say with ALMOST certainty that all of them have the 8" rear. I think they have the 4 pinion gears too.
But as kyle said, If I say all of them do, I'll find one with a 7.5" rear! <img src="/forums/images/graemlins/lol.gif" alt="" />
You'll be able to swap in a 4cyl 8" rear with no problems, and maintain the 5 lug pattern.

1986 Pickup extracab longbed "Woody edition"
SAS - 33's, 5.29's, lockright rear.

02 IS300 SportCross - my "DD"
94 2wd v6 extracab
04 Outback Wagon- wife's/family car