It sounds like you're wanting to do the repair yourself, but if you decide to send it off, I would highly recommend Joe at Atlantic Air Tool.
He is very nice to work with, does a great job and is very cost effective. He overhauled my squeezer for me and I was very pleased at what he charged.
is their website, and they have manuals on there if memory serves correct:
I can tell you this, if you send your Squeezer to Joe Krzyzewski he will get it like brand new for a very honest price. Here is his contact info:
Atlantic Air Tool Co, Inc.
Phone: 931-425-6882 or 6883