Was lucky enough to buy an operator out of a ton of A002 locks from UFO catchers.
I don't route my games, so for home use, they are great, and leaves all my sega candies on 1 key.
For my Taitos I buy these, but since sega locks have a thicker lock post, these wont work on Sega cabs.
https://www.amazon.com/gp/product/B07X475Y7B/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1
I do have spare NAC control panel latches and some other stuff, if you are missing more than just the locks. I just don't have locks left to sell.