1275 Radiator

What late model radiator can I use to replace the 1275 crossflow in a square
body sprite
I went to install the crssflow from a 1500 and the radiator fittings aren't even
close to the same diamter as the thermostat housing or water pump.

So now I'm shopping at the junkyard  for a suitable replacement or a crossflow
from a 1275

Tommy
70B Daily driver
67 Sprite - enigne all bolted up , but no cooling