It would find a local rad place and get a custom one built. Brass with copper core and large grill.
that's what I did. works better than a mass produced Aly one.
these are designed for road use, after a period of time and off road abuse the copper tube and fin goes brittle and splits. you have more chance of welding ice with a blow lamp than fixing. (tried to get a rad for a cherokee fixed and the radiator builds took it as a challenge which they failed after an hour of trying)
Ally rad is more robust and if designed well will keep the coolant cool. Stainless is better but will cost you a fortune to make. Had one but basically gave it away due to having no use.
The plastic end caps are pressed on with normal bend over tabs to secure into place