Yep if you have one of those black graflex inserts those little things are great. My recommendation? They're so small they'd be easy to replicate from a hardware store and still be pretty darn accurate. It would just take browsing (lighting, hardware, finishing sections, electronic, etc) sections and looking for any small golden rod looking part, with that gouge in the top (worst case you gould grind that yourself). You could even cut it off of something larger and sand the bottom - maybe even glue/pressure fit it into PVC or Wood as a plug for the saber? If the rods have little hex nuts on the bottom, then you could find something like that (maybe a finishing washer?) to insert the little rod in
Just some cheaper ideas haha If you're up for some creative legwork