How do we get the block explorer turned on again?
Is there another block explorer service we could get?
Current explorers are listed at mintymintcoin.com, mintcoinofficial.com, and in op. If you referring to chainz.cryptoid.info then they can be contacted via bitcointalk according to their FAQ which covers, "what is required to host an Explorer here?"
https://chainz.cryptoid.info/faq.dws