If you're careful, I doubt you'll hit the seal.
What about: Putting the handle on the edge of the doors, versus the face of the doors?
You could also clean some paint off a couple of spots on the doors, and epoxy the handle on.
Me, I would put it on with screws, however you would need to "through bolt" it, as the thin skin of the door won' hold a sheet metal screw.....For long.......
It would take some disassembly of the fridge interior to do it right, where you could put a washer and a nut behind the plastic lining, then re-install the same.
Edit:
You could do it with "rivnuts", anchored in the door skin, and then through bolts through your handle.
Something like these:
http://www.grainger.com/search/rive...redirect=rivet+nut&perPage=16&requestedPage=2
They sell the same system type thing at Home Depot, I just could not find them on their site, as they don't recognize "rivnut" or "blind nut".
You need a Pop-Rivet tool to install them.
And go easy on the drill, when drilling the skin..........Don't let it "slam through" the skin, and bottom out on the chuck, or it will look nasty inside!