OK, so I went to the FIRST site (
www.usfirst.org), clicked on the FRC link, then Game & Season Info, Competition Manual & related docs.
At the bottom of that page is a document called "How to get more of...". I opened that and found the entry for FESTO Valve. I followed that link, and opened the document on that page called "2010 Valve kit - Download Information"
On that page, I learned the part number of the valve. I also learned that FESTO has a page on their website where you can find their local distributot.
If you do all that and contact your local distributor, perhaps THEY will quote you price & availability.
So, go do that.