You could epoxy bed that receiver!How big a difference is there? Post pictures! -Y
Sorry that it isn't working out. As the information I found said the ones with the finger grooves are Milbros from the 1950's at the latest. The smooth stock was after Diana regained control of the company. from later in the 1950's and beyond. The history and timeline of Diana is very confused in that time frame.Yogi makes a good point. If the new stock is nice, glass-bedding the old metal works into the newer stock would probably work well. Even so, a gap of 1/16" on each side isn't that earth shattering! Probably less work that restoring the old one?Anyway, have fun