Japchester Stock

[beltfed]

YOu might contact Dave Crossno gun stocks and discuss the problem.
I believe they have a pattern for the Japchester/ browning BPCR Hi walls, but they might be able to use your current
low wall stock front end as a pattern to modify off of their Hi wall pattern.
dibbleguns.com
I have a similar situation with a Brg Low wall traditional Hunter action with a 38-72 Krieger barrel on it.
My friend who had bought it from me lost the low wall stock somehow.
I, too want a BPCR Hi Wall pattern pistol grip stock on it. I have actually bolted a Brg Bpcr stock on to the action.
It fits, but the cutout for the tang is longer than the low wall tang, so as soon as I make a deal to buy the barrelled action
back from him, I may pick up a Crossno stock for it, telling them to do the rough inletting on the top tang short of their pattern.
Arnie