Screws for E3500 CPU

Hi,

I am trying to install a CPU on an E3500 CPU/memory board. This requires 5 x
3/32 hex mounting screws that are only threaded up to about 1/4 of the way
up from the tip of the screw. A colleague has had no luck finding these
screws at a hardware store, nor an electronics store. Does anyone know where
I might obtain these?

Thanks and regards,
Andrew