I am a Fair-Rite dealer and carry many of their mix31 parts. Please
check out what we carry at:https://proaudioeng.com/fair-rite-ferrites/
If I can help, let me know...I can deliver to a PVRC meeting which would
save on shipping if it works out.
Cheers & 73,
Howie / WA4PSC
www.proaudioeng.com