Twitch II Detent ball

[Sithus1966]

I aquired a Twitch II that is missing it's detent ball in the AO lockout. So it can move in and out of "safe" when ever it pleases. Anyone know what size the little bugger might be? I figure it would be easier to order some from Knifekits rather than jumping through all the hoops I have heard that SOG will make you jump through.
I know if it was a Kershaw I could get a new one and extra's no questions asked.