No4 Enfield Upper Band Screw Wanted

I took apart a No4 around 30 years ago and have finally got around to putting it back together...i can't for the life of me find the upper band screw ! Anyone have one for sale or know what size it is - CR321 ? I can see you can get them on ebay UK but i deactivated that account years ago doh !
Any advice appreciated. Cheers

Most of the gunsmiths around the traps should have one. Try mike collings in Whakatane

Plenty on the yellow site available from vendor 'bottla'.

Cheers - appreciate your help.

4BA cheesehead slotted screw... I might have one loafing if you get stuck or at the very least could make one for you.