Forster is .183, and RCBS is .152, ....... I ran into this problem years ago. Easiest solution is finding someone with a lathe and then hardening them.If you can give me the diameter I will check the RCBS pilots I have. Do you have pin gauges or can you tell me the measurements of what you have?
Cheers
Look like they for RCBS or Hornady, so different shaft size then the Forster!Here's where I bought mine:
https://mcjtools.com/products/mcj-tools-case-trimmer-pilot-15-sizes-shaft-3-16
They also make a whole bunch of other neat & useful tools.