The T-2/T-4 radiators are not available aftermarket and are no longer available from Chrysler.
First determine why the vehicle is running hot/overheating.
Flushing, replacing the T-Stat, Radiator Pressure Cap and Filling with the Proper 50/50 Mix of Coolant being sure to Fill Properly
so there is no air in the system is a good first step.
Our t-stats do not have a bleed hole
,drilling a 1/8" hole in the t-stat housing and placing that hole in the 12 o'clock position when installing will help to alleviate air when filling and lessens "thermal shock" on the head gasket.
SEE The Dodge Garage
Turbo Database, How To Section, Section 27 Tricks and Tips for Going Fast, Item #2.
(You can still use the recommended 195 t-stat when doing this so the engine runs at the proper temp that Chrysler recommends and you have good heat in the winter.)
The other things to look at are...
1)Is the cooling fan cycling on and at the proper temp?
(You can backprobe the CTS and read the voltage when the fan cycles on and off, see images below)
2)Are there any soft/collapsed hoses.
3)Are there any obstructions in front of the radiator/condenser?
4)Is the front lower air dam installed properly?
On cars with no frontal grill area (Daytona/Lebaron) the air dam is crucial, its job is to divert cooler air up to the radiator when the vehicle is moving at speed, if the air dam is missing/damaged the result will be running hot/overheating when the car is in motion.)
PROPER DRAINING/FILLING OF THE COOLING SYSTEM
BACKPROBING THE CTS/CHECKING ACTUAL COOLANT TEMP