It seems there are several of us out there in search for the valve. Can you use a valve/regulator from another brand that has a flexible rubber hose attached to a fitting and simply just cut off the fitting and attach the rubber hose to the Kangaroo Kitchen burner?
For a visual idea of what I am talking about checkout this link:
http://www.coleman.com/coleman/colemancom/large.asp?productid=9928-A55&prodname=Roadtrip%AE%20Pro%20Combo