Hi Grant
Not the source that I was thinking of the (I have not found my link to the site yet, may not have made it on to this computer) the outfit I was thinking of was primarily a heavy truck out fit that does reproductions of `40 and `50s as a sideline. I'll keep looking.
One other possible source is
http://www.coolcraft.com/ that list Chevy and Ford Truck radiators in the early `40s similar pricing to
http://www.walkerradiatorworks.com But both of these are showing prices less than some of radiator shops around here are quoting to "make" on I suspect they are just planing to order it and tack on a profit.
Like you I have not used either of these companies I'm just looking for a good source for the day one of my trucks develops a leak. I've bought "NOS" radiators off of e-pay what I got was material to have re-cored.
Cheers