Crack head 🤬 what now?!

Not sure what to do, so I thought my issue was a blown head gasket and apparently after taking the head to the machine shop it was found to have a crack in the head and the shop says it can not be repaired. Where should I pick one up or look for one? Found a few options on eBay for $ 400-$600 for tested heads but maybe you guys have better experience on this one…