The model 1902 rear sight for my rebarrelled Krag is currently attached using screws I machined with great precision from socket head screws using a cordless drill, file and Dremel.  Anybody know of a source for 8-32 screws for Krag sights on a Criterion barrel?  Numrich provides a set of 8-32 screws with their barrels but don't sell them separately.  I can have some made but I figure someone will eventually make a bunch and sell them. 

You might try Brownells on the phone. I looked in their catalog and could not find them. I have bought 4-48 NF screws with slotted heads from them and I could not find them now.
Criterion does not have them? Odd they would make a barrel and not supply the screw needed for the original sight.
I do production machining, if Brownells or Criterion want to order several hundred made from W-1 tool steel or something similar, I might be talked into it.

I thought those were fairly common hardware store items.  If not, ebay has a selection.

S&S Firearms sells reproduction rear sight screws for $6-$8 bucks apiece.

Last time I looked they were not 8-32 but fit the original barrel.  I'll check again.