Ah, your first post did not specify "Screw Terminal".
Honestly, if this was my baby I would grab a couple of these:
https://www.mouser.com/ProductDetail/Co ... oV7OI9w%3D
and fabricate a utility PCB to run those pins out to a plated pad that I can bolt existing stock wire to.
With a PCB it would be a snap to "fill in" a couple hundred uf (if desired, I'd honestly just run 6K8 and call it a day - it'll probably measure closer to 7K anyway) and throw some film caps for transient shunting while you're at it.
Or, if you want to go with the simpler screw only here are some options:
6K8:
https://www.mouser.com/Passive-Componen ... =Pricing|0
Or you can size up to 8K2 (or 7K5, though while a member of the E24 preferred designations, it is something of a red-headed step child these days).
I don't know what the top end of your stock tolerances are, but me personally, I would avoid going too large based on the general fact that line voltages are a touch higher these days (YMMV) and transformer insulation generally does not improve with age.