Take it to any GOOD welder and they can cut the flange off the GE runner and then cut the flange of the GTE lower runner and weld the GE flange too it.
If you don't know anyone to do that, shoot me a PM. I know a guy that will do it as he does a lot of modification work for me and he is not sloppy or cheap. It will cost 180-200 to fix as I have done it before. Obviously, that is his price, shipping back and fourth is not included there.