[SlightlyDistracting]

I need help.
The pictures attached of a 22 varminter built custom by my great uncle. It was built by him shortly after the war.
Tomorrow im going to mount some new glass on it
Ive never been able to find good rings that will fit it
Its old and has no holes for mounts.
They wont fit most weaver style rings because there is cross. Instead where the rear ring goes, it has a hole to keep the ring from moving

Anyone recommend me rings that will fit the action?