It really needs to be anchored with a large slot like this.
If you cut everything but one cable boss and enough metal to support it, and weld a couple pieces of 3/8 keystock to the plate to form the slot, it may work, but it's hard to say without actually trying it. I thought about it, but guessed I might end up with something that wouldn't work. If I had an old ugly one, I would try. Not worth buying a new one just to try though. The one pictured here is only 4 1/4" aluminum. 4 1/2" azusa shoes
should work in the stock plate though, for fairlanes bike though.