I had heard Matt Savage went bump in the night a little while ago but the website seems to be going strong
Perhaps they are under new management? The Viair stuff is pretty good. Most independants can source. Get a twin cylinder one if you can stretch to it. For real H/D the on-board tank stuff that Savage used to sell is good (if a little expensive). You can import from the States cheaper though
This is the only way to go if you want to run high CFM tools.
Some people convert air con compressors with an on-board tank (bodged gas cylinder) arrangement but it's all a little Heath Robinson for my liking. . .