Replacement radiator suggestions

A 2 row might work, -but-, might not too, considering you're runnin air con.
If it doesnt you'll be unhappy and then spend even more to refix it.
Mopar Action put a local discount 3row replacement in their Savoy and found that the new core had smaller tubes than the original, it was like the new 3 row wasnt any better than the old 2 row. (Mop Actn Aug/2007)
Keep up the search for a new 3 row or find a good salvagable unit and have it recored with a high efficiency core.