Rickenbacker 4003 spare part

[sirmuppet]

Hey guys.

Need advice on a  spare part for Rickenbacker 4003. You’ll all know the mute part under the bridge. Well one of the screws has come out and gone missing. Does anyone know of a screw that fits or a set I could get to replace them and any links?

Only reason I ask rather than going to Ric and asking is I know Ric spares can be expensive and take a long time to get.

Any help would be great. 

Thanks guys :-)