Size is only part of the puzzle, you need one with the hose fittings in the right locations. It won't be much use to get a radiator with hose fittings that are pointing straight into your coolant radiator.

If you are up to the job, you can buy a custom radiator and have the tank ends split to have part for coolant and part for the intercooler. International does its trucks kind of like that with the radiator and intercooler side by side instead of one in front of the other.