RE: PST contact?
Keith,
I believe they do make a FOD screen for it, but these things are not rocket science by any means. I'm sure there are many available that will fit a 600R and not restrict the airflow through the engine.
I could look into getting one from PST for you if you like? PM me if interested.
Festo's manufacturer of ball valves does not make a variant of the valve with bolt down features (although it sure would be nice if they did...). They do make a bulkhead union style valve, but that's not really a good solution for most, so the mountain clip solution that was suggested earlier would likely be your best bet.
Kelly