You might look at Wizard cooling in upstate NY. No epoxy, all USA. I've seen them in person at a couple of shows - nice work. Lots of options and unlike most companies their shrouds do not look like an afterthought. They use Maradyne as well as Spal fans and their website has lots of straight forward information - virtually no hype.
https://wizardcooling.com/1967-1972-...inum-radiator/