The first thing you should do is find out what type of screws they are (metric or standard), then find out what size and thread pitch they are, then measure how long they are (the threaded portion). Once you get that info it will be easier to direct you to a source. If you don't have the means to determine the type, size, and thread pitch of those screws, perhaps someone on this forum has the same knife and can tell you.
What is needed for this is a thread pitch gauge and an accurate ruler.
There are several online sellers of mini screws. But some require that you buy large quantities, and you obviously don't need a bag of 100 screws. And I'm sure you don't want to have to pay for 100. Like I said, once you figure out exactly what size you need it will be easier to suggest a good source.
