Radiator question?

I bought a 70 duster with no radiator? Where can I get a cheap one for a small block car? Everyone is getting Like over 200 bucks!!! On eBay I seen aluminum ones for 140 but only 2 row and not direct fit.... What are demensions for a stock rad?

I wouldn't worry about how to mount it. If you look at the picture of the radiator in my car you will see the we used 4 hard rubber blocks bolted to L brackets to mount my radiator. I wish you would have told me 6 months ago as I sold the very radiator in the pic for 50 bucks. I thought my overheating problem was due to it but it turned out to be the hood to rad support seal being missing. Oh well I hope the info is helpful