Any! you will probably have to cut the dash to fit it though. The one in it now just has a small cut out for the radio body and two small holes for the volume and tuning knobs if I remember correctly.
I doubt you will find a radio like that now-a-days. I know my brother get some truck parts catalog(like JCwhitney, or something like that) that has a lot of old truck parts in it, and parts for hot rodding them and it has the old vintage radios like the one in your jeep but they are WAYYYY expensive. I have a newer kenwood unit I just got about a month ago and mounted it under my dash for now, until I find a permenant place for it.