If the tires are the 37", then they are probably the Goodyear Wrangler MT's. The bias were only 36".
That is ~300/tire, not far off what it will run you if you include your time as labor to do them your self.
Rim ~40
New Center ~40-75 (depending on pressed, flat or type of design)
Rock Ring ~45
Paint ~40
PVC runflat~40
Decent 37" Wheeling Tire ~50-15
That's close to 250/wheel&tire without labor. Deals can be found, and prices can fluctuate. If the tires are brand new (or real close) then it's a pretty good deal if shipping doesn't kill it.
I think it has been mentioned before, but the 8bolt rims are more than enough for what we do. We are not trying to run a 10,000lb truck out on the trails, and we aren't running tires up near the 35psi most of the time.