My worst nightmare.
If the cracks get worse:
Toscan optics in Italy will make a new corrector to fit a c8 for maybe 380 euros . There would be a lot of optic tuning to get it to work I think but can be done.
https://www.toscanoptics.com/schmidt...orrector-plate
Failing that you can sell it here to someone who wants to make a new one. People do.