SMART! I know many who bobbed their original Hammer and now want the original Factory Hammer back. The easiest way to do that would would have been to simply reinstall the original (if like you) one was smart enough and had enough foresight to get a replacement to mutilate and save the original.

I sincerely doubt you will find a Factory bobbed Hammer since they are rare, but you should still be able to find a new one on Fleabay, GB or one of the other parts sellers. Minor fitting might be required but some do just drop in.