I'll try repairing mine seeing all the apparent angst caused by buying a new one that doesn't fit. I've already repaired my radiator so I'll give this a try.
A small amount of skill with a propane torch on the copper aftermarket ones and they fit fine.
Just soften the solder and realign the tubes as needed.
I have done this without issue, and I really can't imagine breaking the box trying to make one fit.
