If you have a scrap bezel with a good pip then pop it out, glue it into the good insert, and relume it. The method described on the other thread involving making a lens in place with epoxy is your best bet otherwise. If it isn't a vintage/collectable piece and original appearance isn't an issue, I usually mix my lume with the epoxy until the mixture is rather thick, then I fill the pip from the back, no lens.