Maybe if you were more specific. What type of alternative are you looking for? If larger is what you want, you could replace the f.o. rod and leave the side facing the shooter a little long. When you melt it, it will make a bigger blob than oem. Not a massive improvement, but might help. I also remember seeing black replacement rod somewhere as well if you don't care for fiber optic sights. A phone call to Stuart at CZ Customs is your best bet to see if a different replacement sight is available.