Thanks guys, much appreciated. I did find what looks like the right valve: link
I think the Weber part no. is 11810007 but not 100% sure. Relatively inexpensive, but my advice for those of you running old Weber Genesis 1-5 and 1000-5000 is to unscrew those valves off the manifold and give them a good cleaning. The brass should last forever, very easy cleanup. Just make sure to use some pipe dope or yellow tape to screw them back onto the manifold.
I think the Weber part no. is 11810007 but not 100% sure. Relatively inexpensive, but my advice for those of you running old Weber Genesis 1-5 and 1000-5000 is to unscrew those valves off the manifold and give them a good cleaning. The brass should last forever, very easy cleanup. Just make sure to use some pipe dope or yellow tape to screw them back onto the manifold.