I was asked for the thickness of the radiator's core...hellifIknow.
Apparently there are two Delphi radiators that should fit, both have the internal radiator and oil coolers. One is 24mm thick, the other is 36mm...part numbers RA1105 and RA1124 respectively. I'm thinking RA1124 since I can actually find that one in a few places.
A local shop will sell me an aluminum core/plastic tank one for $134.00 with a lifetime warranty. May not be a bad way to go, they also stated they'd R&R it for just under $70; which is relatively cheap, though I will likely do it myself anyway since I have some other things I'd like to address while it's out.