I found that even in just Z scale, no two wheel sets are alike from manufacture to manufacture. So there is no way I could guarantee N gauge wheel sets would work how they should or at all. Also I cant guarantee the truck bolster will match up and work with the N gauge body bolster. But if you want to take the chance, I can scale them up.
Have you looked at MTL deep well N scale cars? They do make one with buckeye 3 axle trucks and one with continental 3 axle trucks.
- Jon Pope