I have black Ego screw kits available, proper black finish stainless so no rusty rusty, £6 posted. Consists of grip screws, eye cover screws, feedneck clamping screws and frame screws. PM if interested.
Also have available nylon-tipped trigger adjustment screws, and various part not included in the spares kits, like LPR adjuster and rail screws.
[/salespitch]
p.s. CraigG: mild steel rusts in no time, and american thread screws are a pain to find in this country, unless you're willing to buy them by the hundred. The average local hardware store will just give you blank looks if you want anything that's not metric.
EDIT: I don't currently have black rail screws for the frame with builtin rail. I can forward them as soon as I have them in if needed.