This being a .318, I wonder if that would even be safe. May end up with a disc of a bigger diameter than the base of the cartridge.
Could this be tig welded and refiled? At least then it may be possibe to keep the same sized discs and the lock screw.
Obviously a high skill repair is needed. May be worth it if the price is knocked down by 2/3...
Not crazy for the iguana, snake and monkey-headed sea monster engraving motif though...