I bought one from Speedway. It was called '32 loboy radiator. When I got it it was from Ron Davis Racing Products in Phoenix. It is aluminun and it was not cheap. Very well made and has worked good with no problems. You might check With Ron Davis and save a few bucks by cutting out the middle man. Hopes this helps.
I've bought them from Total performance. They sell Walker ones,and seem to deliver pretty fast. Got a 6" chopped one for a customer,took 10 days to ship. I get a little discount but not enough to p*** along a savings.
Bret Please do measure it - I had one in my 29 A with a 302 and it worked well. I didn't think to write down the dimensions.
With you being in /michigan, if the dimensions Bret gets for ya are not right, contact Hankinsons Radiator Service in Grand Rapids. I do not have thier number with me or I'd post it for you...try information and they will get it for you. I believe they are on West River Drive...and it might be in Comstock Park, but Grand Rapids information will have it. The built one for me to fit in a cut down 29A shell....it cooled a 500+hp 400 small block with ease...and cost $185. They did one for a 57 chevy for me about two months ago...it was $218. I've delt with these guys for 20+years...to me the are by far the very best and have always had the best price.
I just got 1 from PRC "the Rod Shop". for my 4" cut down '32 shell for $417.00 (It is a work of art.) MIZ
Id go with the mustang if you tight on cash. They are 21" tall, and 19" wide. The have mounting flanges on both sides that can be tapered on top to get them to fit in a 32 grille pretty nice. they are flat on top, and dont fill up the shell like a real 32 radiator. I dont think they look bad. New 3 cores can be purchased on ebay for $105.00
paid $105 for my mustang radiator from radiator doctor. great radiator for the price, fit right in my 28/29 grille shell. the top of my shell is pie cut to match the cowl on my "T" still no fitment problems.