I had great hopes for my Thomas T635-HD air compressor after Received it a years ago. At the time, it was considered the most quiet compressor in its class. When it came time acquire a rebuild kit, I was SOL. Appears like vehicle went out of business or merely stopped providing support for your line. While I am generally good about obtaining a difficult to acquire part, I selected it just wasn't worthwhile trying to produce a well used air compressor backwards. I do what I typically do and checked out Sears, Home Depot, as well as did some research online.