Brian,
Check out Tangent's newest releases of PS-1 combination door box cars.  He's doing  50-ton solid-bearing Barber S-2 spring plankless trucks, ASF 50-ton A-3 Ride Control trucks and A-3 50-ton roller bearing trucks.  His wheelsets fit my trucks.

I hope he will sell enough separately to fill a large demand for years to come.  Tim O'Conner should be happy.

Brian Leppert
Tahoe Model Works
Carson City, NV