[Khledar]

What about somethign along the lines of a #rotor block. Har - not what you're thinking though! I remember there was block #rotor made which did not use the pin style, but two sheets of Alu. I think his specific application was TECs too, it's an old concept but might work, it was very simple, however #rotors site doesn't seem to be up and my memory kinda sucks. But if I remember it was essentially two sheets stacked with some sort of wire soldered (probably somethign else for Alu, but some low guage copper wire would work prostyle for this) just inside the perimeter of the plates to create a gap between the plates, the inlets and outlet were just in the top of the block - no channeling - very simple just a very thin rectuangular water cavity essentially, probably no performance machine, but effective, also easily adaptable for larger surface area (TEC).

Maybe someone remembers the idea more clearly than I.