As a followup I have managed to stumble onto a very nice H&H length action that has been rechambered to 300 weatherby, and have also located an excellent original 300 H&H barrel that will be installed shortly. Sometimes better to be lucky than good!
Gun in question has an aftermarket stock (rollover cheekpiece) that will not stay as it is for long (may get a bit of a makeover if the foundation of a decent stock is there). Search will be on for a pre 64 monte carlo (refinished would be fine for my purposes) or a quality synthetic to get the rifle back into action.
