You could try MV commercials at Livingston. They were knocking them out, brand new at 80t, with twin wheel tags at a pretty reasonable price.
Before they are any good in day to day work though, you have to find someone who will doctor the suspension air pressures, and allow a higher load on the drive axle than what is permitted by the factory settings. Otherwise, they will skid on a Snitter! ! (The ones they have are not super space, in case that makes a difference)