I don’t know anything about “your” tractor but, for fun, I tried to find some info on it via an internet search.
I found the picture below at this Web Site: http://www.little-mountain.com/pioneer/Pages/2004pics.html
It doesn’t exactly match yours but in my search I got the impression that a front wheel mechanism off a Avery A, General GG, or Moline BG would fit this tractor. If my assumptions are correct it is possible the front wheel on the one in “your” picture or the one in “my” picture could have been changed. Hope this helps in your quest for information on the tractor in “your ” picture. So far I have not been able to find anything on a company call Custom that made anything like the tractors in “our” pictures.
This is an excerpt from the caption that goes with the picture:
1948 Custom tractor owned by Mr. Millsaps of Lynchburg, Tennessee. The Custom tractors were sold by Montgomery Ward