2 months of light use: rear bright, front dead/broken - Meprolight Tru-Dot Night Sight Set for Jericho 941

Started impressed, now very disappointed. After about two months (and only about 200 rounds in that time), the rear is still bright as you could hope for but the front is completely dead, so dead that I have to wonder if the tritium insert simply fell out. I really wish there were another option for my Jericho, but I guess I'm stuck ordering a replacement from Amazon, as OP doesn't seem to offer it alone and I'm certainly not buying a whole additional set.