Actually the 4 row aluminum radiators are showing up more and more on E Bay and other places with Champion seeming to be the major supplier.

"..... A 2 row 1"tube will measure 2" at the core....."

The front and rear rows of tubes on a radiator are not stacked one on top of the other, there is a gap between them. A 2 row with 1" tubes has to measure wider than 2" at the core. If the core measures 2" then the tubes are narrower than 1 inch.

All I'm getting at is you need to carefully read the description carefully especially when buying a mail order unit.