If you just have one that needs to be rebuilt, you may try A & B Auto Electric in Burnsville, MN. They've done them for me.
A & B Auto Electric
12601 Chowen Ave S, Burnsville, MN
(952) 894-5147
Otherwise, Rudy Philips or Tex Dean in OK may have one, his number is (918) 341-4813 and the last e-mail address I had for him is
TJSPJS@PRODIGY.NETTex's prices are always a bit high in my opinion but he may have one.
The challenge you have is that it is a '53 Henry J which used the Delco-Remy starter whereas the '51-'52 Js had Autolite which is pretty easy to find. In my opinion, the Delco is better but also a little more difficult find.