I bought an Ebay 50mm radiator, twin core. No word on fitment other than the pins are slightly offset front/back? due to the core thickness, but should fit my C53A radiator support.
C53A radiator = E39A except for top hose location being offset and coolant overflow/outlet spout angled differently. Every radiator I found listed, had the same bolt locations for the fans too!
Click for the the thread about Koyo and other rads here on the board
233 is the number senonemous with Galant radiators.
C0233 gets you a Koyo, CU233 gets you a Spectra Premium or other knockoff products. Just about everythings in the basic spectrum is coming from China and is plastic tanks, with auto trans fluid fittings (hurray for leaks from this some day, just because). They all spec out with similar core thickness's, but Aluminum will get you the thickest core yet, should you need it. I got my aluminum radiator for a decent price, the Spectra Premium stuff you can find for $100 US on "Amazon.com", or in my case $214 on "Amazon.ca". Any guess's where the ".ca" parts come from .... oi!
So, take your pick, and have one to your door in no time flat!