Some truck dealers in the NE will still change Splits but they are dangerous. Almost got killed by one blowing off once. Go with Budds.
Rims for spoke wheels are generally referred to as "Daytons" since Dayton was a big manufacturer of spoke wheel/demountable rim systems. Stud-piloted disc wheels are commonly referred to as "Budds" since The Budd Corp. was the first to come out with these wheels. You hear hub-piloted disc wheels called "Unimounts" which is what Motor Wheel called their wheel when they first introduced hub-piloted wheels in the early 1980s.