Brake drums

[hairball]

Hi all
My original brake drums on my 65 C10 had a cutout in the drum for a brake spoon to adjust the brakes. I first ordered Raybestos drums and there was a place to knockout but damaged the drum while trying to punch it out. I then ordered Bendix drums and there is no sign of a knock out plug. Both of these brands were made in China. I realize that I can just pull the drum off for adjustment but what if the brakes became too tight and not being able to back off the adjuster to remove the drum? Is there a brand out there that matches the original drum with the adjustment hole in the drum? Thanks and hope everyone is staying safe.