Harmonic balancer repair sleeve any good?

Has anyone used the repair sleeve for their 360 harmonic balancer? I don't feel like dropping another $100 for new balancer, so I thought I'd consider this $8 repair sleeve that seems to be widely available.

The rubber seal on my balancer looks good. However the crank sealing surface where it goes thru the timing cover is badly worn.

Is the repair sleeve a good option for a tightwad like myself? Thanks -