Is Quennville still available?
No, which is why it's stupid to consider firing Sullivan now.
When people were clamoring for Bylsma to be fired, there were only 3 coaches that I knew for certain would be an upgrade. Babcock, Quennville and Trotz. Not to say that there weren't coaches better than Bylsma, but it was pretty much a guarantee. The Penguins fiddled around with Bylsma and missed out on Trotz. They got lucky with Sullivan.
You aren't going to get lucky again, or if they do then the Penguins are extremely lucky. Every coach was made to be hired and fired, every coach has flaws, every system has flaws. The Penguins have made good decisions and bad decisions the past two seasons, firing Sullivan now would be worse than trading Letang or whoever else people want gone. There will be changes. Rutherford's seat should be hot, Sullivan's should be warm. Rutherford has built this team around a false notion of needing to be tough. This is his doing.