They obviously did at one point. I don't think they have made 5 on 4 for a couple decades.
Best way i know of to see whats availabe in 5 on 4 (except for team III/ E-T mags) is plug in 5 on 4 bolt circle to summits wheel section and see what comes up (not much, and all 15" except for the Boyds).
Several years back, ARE increased the size of the hubs and center cap bolt pattern to accommodate larger disc brake hubs on modern cars. That means there's no room for a tiny 5 on 4", there's too much metal in the way.