I am glad I bought a 3/8 collet while still could.
Muscle chuck might be an alternative. I have not tried them yet but it looks interesting. My PC routers require 2 wrenches which is a pain on a router table and especially on my CNC where I make frequent bit changes for one job.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.