I recently won an auction for a vac to rebuild (golden pearl, 1941, speedline filler) that was missing it's blind cap tassie, it's one of the ones without the threaded jewel. It just has a faux jewel machined into the blind cap, and a ridge where the tassie aught to be. Can a replacement tassie be added back on? I assume the old one's gone because of celluloid shrinkage, so would a replacement have to be glued on or is there a better fix? I plan on keeping this pen for my collection but I'd really like to have it complete with the tassie. Also, are those reproduction tassies I see on an auction site any good, or are they ill fitting and not worth it?