34" is a standard width for truck frames.
In a small town, a local welding shop can probably do you a good deal
on a custom weld-in. Mine cost $300, which included cutting off the tow
hooks and related extensions and cross member.
Welding it on is not final. When I switched to a newer bus, I cut the
welded hitch off with a cut-off saw. I rented a big commercial one
because I had other cutting to do also, but a $40 angle grinder and a
few blades will do it -- and now you own a very handy angle grinder.
How long a rear overhang do you have? If your engine is in the front,
you have a long rear overhang and your trailer may scrape on the
ground. I mashed my trailer landing gear in a filling station driveway.
On my new bus, I'm putting the hitch all the way up in the frame.
If you plan to move the hitch to another 34" frame, then have the shop
fabricate it to be bolted in.
Mass produced hitches are usually made to bolt to the flanges of the
frame. I sure prefer to bolt to the web of the frame.
Good luck, and Merry Christmas!