LA offset cam keys

Yes. But you don't get to fight the key in and out of the groove that way.

I saw Hughes has Multi Keyway double roller timing chains for sale these days.

I just bought one of them at Indy. Nice timing set and has the different slots on the cam sprocket so you don't have to remove and reset the degree wheel to make changes. 1,2 and 3 degrees at the cam which = 2,4 and 6 crank degrees.