Did you have a picture of the goat prior to shooting? Even if did not get a picture, a good taxidermist that has a bit of artist skill can add on to your horns and with a dab of paint where broken meets new...you would never know it was repaired/built up. Heck, you can get 100% replica horns or buy real ones. I visited a taxidermist once and a huge pronghorn buck was on the wall. Was 18" or better tall! I asked and he laughed saying some guy shot a dink and wanted to get a trough so replica horns we ordered then the guy never showed up to pay the balance due so the buck was placed on the wall sort of as a "jackalope" sort of inside joke.
