Cant identify valve cartridge

[RWolfe]

Hello all. I'm new to the forum here. Been doing plumbing for a while. I'm helping a friend who's shower was leaking hot water to spout. I puled the cartridges out and noticed someone had serviced the seals and washers before. They had Jerry rigged them with off washers and so on. Come to find out I can find these anywhere. I don't even know what brand it is. The house was built in 1967. The home owner has lived in the house for at least 30+. Any info would be greatly appreciated. Is it possible the replacement looks different. I know this is a long shot, Don't fire me if this is outrageously silly. Attached are the pics I took of one hot stem cartridge and the diverter. Also I didn't measure the valve but I'm sure its close to 6 to 7 inches long. Thanks for your time and have a great day.