Lost screws, can not find replacement

Hi

I kept an ipad mini in for a repair couple of months ago for an LCD but customer didn't have the money straight away, so broke the ipad down so all I had to do was put the thing back together.

I put the LCD x4 & Plate screws in a sealed sandwhich bag......and I can't find it!!!!

I've taken the kitchen cupboards off the wall thinking the bag fell down the back but nothing!

I can find screws for every ipad apart from the Mini (i'm in the UK)

Is there anything else compatible to use?

Thanks