Just following nmtaxi's suggestions, after piecing it back together, paint it with appliance epoxy and it just might look pretty good. In fact, I have euro mounted my last 7 whities and finished them off with the bright white appliance epoxy and they look great. I get more comments on my euro mounts than my shoulder mounts. Of course part of the reason I paint them is because I struggle getting the bleached approach right, unlike the professionals (taxidermists) who can get the bleached approach done right.
Good luck, hope you can get it fixed.
Last year my wifes dog got one of mine and chewed the G2 off. I had left it for no more than 5-minutes and the dog snuck in and chewed the heck out of it. So, my 18 1/2 inch dark horned mountain whitey has no G2..............
Good luck with it.