Following Primaz advice, I had a brand new aluminum radiator made by Wizard Cooling (Wizard Cooling Radiators) that incorporates a transmission cooler, a part that could fit later Mk2 with a BW35 transmission as well as other later derivatives. This will eliminate having a transmission cooler in front of my aircon condenser, itself in front of my radiator.
For those of us with the need for a transmission cooler, this is a relatively difficult part to find. The price is also lower than many other vendors.
JP
1960 3.8 Mk2
700 R4 transmission