Bridge Saddle Adjust Allen Head Screws... Spalding Fastners of the bay... A2 stainless Hex Head Grub Screws Ibanez 4mm size rather than Fender 3mm me thinks... but check! go for Dog Point... couple of quid!
https://www.ebay.co.uk/itm/DOG-POINT-A2-STAINLESS-STEEL-METRIC-SOCKET-ALLEN-GRUB-SCREWS-M3-M4-M5-M6-/293221192240?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0
I've had 3 lots from them to replace saddle screws on cheapy bridges, replacing the badly cut ends with a nice Dog Point, and used different lengths so ya dont get loads sticking out the saddle and in ya hand!
Also did the Epi LP guitar saddles...
Soak the saddles in plus gas or WD40 for a bit if old screws are stiff and rusty to stop em wrecking the threads in the saddles tacking em out...