Look for a BMW rad from a early 90's 750 series. It is a single row with 1" tubes, crossflow, has a trans cooler built in and has the inlet and outlet where you want them, trans in/out on the driver side. Overall size is 25-9/16" x 17-1/4" x 1-1/4" core size. A late 80's is a 2-row, same height but an inch narrower and is $100 cheaper brand new.
A lot of the mopar guys use these in A bodies for their size and superior cooling ability.