Thing of it is with the hundreds of British BLNE guns out there, Anyone could configure Mr Stansburys gun for themselves. It would be a bullet proof shooter.
The combination of longer barrels with a raised flat rib a single trigger and a straighter stock is not the norm on blnes .The suitable pigeon and wildfoling guns are not as numerous as the concave ribbed 28 inch barrelled lighter guns and single trigger gun s were never as popular. It could be done though and as prices are probably comparatively cheaply but a little searching would be required.