Europa-List: Proper Bolts for LG03

[EuropaForum <Post2Forum@comcast.net>]

Does anyone know where to get proper spec. bolts for holding mono wheel 
swing arm bearings (LGO3) in place?
All the manual has is 4 off 5/16 UNC X 2 1/4 bolt head A A \  S  \. I 
want to get the proper material and hardness and a pre-drilled head.
After 10 bucks in cobalt drill bits all I have is a bolt with a 1/16 
drill bit snapped off and fused in the bolt head.

Thanks,
Steved.