I've been collecting info on UL plugs lately from British, Polish, Argentine etc websites. The stuff I'm looking at is 3/4-1 1/4" and a gram or two. So anyway I'm in the very early stages of trying to make some.
The lips are tiny. Started using #00, #0 and #1 indiana spinner blades as templates. Use a pair of surgical forceps to clamp the blade to a bit of Lexan. Nippers all around to rough shape and a sanding block to finish. Works well, for that blade shape anyway.
bill