Putting this out there for future reference or if anybody is currently looking to replace their radiator fans:

At the Goodguys show, a local company called Old Air Products (www.oldairproducts.com) had a booth with all kinds of A/C and radiator products. I'd never heard of them before and didn't even realize they were local until I picked up a brochure. One of their product lines is SPAL fans http://www.oldairproducts.com/catalo..._39000001.html . Some of these are quite thin and high flow. Since they are local, one could probably even get a fan from stock, walk out to the parking lot with it, and do a fit check before buying. They aren't all that expensive either, surprisingly.

In the past, I've used fans from racing supply companies, etc. but it's nice to know we have a local supplier too. I have no affiliation, btw.