Morning, took a few more pics.
Here are both of the (assumed) exchangers. I assume the trans heat exchanger can be ignored (for now). The oil heat exchanger is slightly different than in the guide, but as I mentioned it didn't show any *external* leaks, but of course this failure can be internal. I did replace the gaskets once before as it was leaking between the engine and the housing, but I guess I'll be cracking it open again to see.
Also I opened the filter for a quick peek, and it appears to have done its job as a filter as almost all the milkshake was contained to the center/inside of the filter. Lemme know if that helps pinpoint the source of the failure.