I have bought quarter ribs from Ralph in the past, I did not know he was no longer offering them. Seems like a whole bunch of things that were on offer before the pandemic are going away never to be seen again. It is really becoming a challenge getting parts to build custom rifles. I have to make a quarter rib this winter for my own rifle, if you do not find one but then I can likely Make you one. I would not be able to get to it until February or so.
Steve

http://www.bertramandco.com/
Booking African hunts, firearms import services

Here for the meltdowns