I like either Novaks or Heinie "Straight 8" sights. I doubt they could be fitted to your gun without machine work, but you can search for the mfg's websites and see.
I don't think there is a true beavertail safety that will fit your hammer. I know the high rise Wilson's require a commander style hammer (Nastoff style hammers work with these...which is what the Colt XSE series come with). There is a safety called a duckbill, which is not so upswept as the true beavertail that might work.