I got my valley cover along with some other odds and ends , and some great tips from Ryan J at Shady Dell.
Brett is an awesome source for info on these , but I've yet to pester him for parts.
Ritter- Weber still has some stuff and sometimes get around to making more , but my dealings with them left me with the impression that they'd prefer you know what you need and order accordingly.
Understandable too.........the huge number of ways to skin the R-3 / W-9 cat leaves a lot of room for interpretation.
Between deck heights , valve angles , cam bearings and etc. etc. , You can take as many steps backward as forward while you are sorting things out and some of them have price tags , some only man hours.
But they are unique little beasts and I am really enjoying mine now.