I'm not aware of anything being made for it. The factory issued sights don't lend themseves to easy change. What the manufacturer does is use after market lasers to make up for it. Take a look at some options here: Link Removed
Only two companies make night sights for the lc9.They are xs big dot.Only the front sight is tritium.Novak both front and rear is tritium.However the novaks are expensive.I think they was around $180.You have to call novak to get info they are not listed on web site.