I found mine on ebay. I had to order it from Tokyo, but it was an exact fit and works well. I tried several local radiator shops to see if anyone could repair the old one, but no one wanted to touch it. Here is a link to the thread I made on the whole process. http://www.minitrucktalk.com/showthread.php?13803-Radiator-removal-and-repair-replacement
I have bought parts from Yokohama Motors. http://yokohamamotors.net/store/page61.html You can email them with your vehicle ID number and they'll get you the right parts. parts@yokohamamotors.com If I remember correctly a new radiator is around $250 plus shipping, taxes and customs.