Hi Garret...

The guys at MDS haven't answered to my emails since a couple of months, I don't know whats going on. Have you paid for that??

Horizon Hobbies in the USA used to carry MDS engines and parts, but I don't know if they have spare stock.

You mean the screw that gides the throttle barrel or just the screw that sets the idle speed on the c1 carb?

I think the scre is quite a common size within model engines, just try some/modify it. Those are normal screws!, if it were the barrel guide screw, you'll have to cut a screw to size and round the tip...

Saludos,

Jorge