I may have some.
If I don't get back to this thread within a day or 2, ping me to remind.
Also, here's some +2mm oversized valves from CA-Cycleworks, those should give your head guru wood:
http://www.ca-cycleworks.com/ca-cycleworks-stainless-valves-45-40mm-in-ex-2-each-piston-kitsDunno if that's a set of 4 or not....