Loose ball bearing for bit holders

[oldel]

Sick of the band spring coming loose and losing the ball bearings that my tools use to hold hex bits and sockets etc. Usually just buy a new tool but I'm getting sick of the waste.

Does anyone know of someone that sells an assortment of loose ball bearings, like a box of them you can get like you can by assorted o rings, clips and fuses?
Right now I've got 2 different 1/4" hex bit tool holders that need 1/8" or 3mm bearings replaced, and a 3/8" socket hex bit holder that needs a 9/64" or 3.5mm bearing I think. No idea how to ascertain if the bearing is metric or imperial so I'd love a box/kit to cover me and for future use.

If not there's a uK shop I suppose I can get various sizes and make my own kit, apparently ebay lists a lot because cyclist like to build their own bearings with loose ones.
Best seller with complete range I found so far is in UK and on ebay https://www.ebay.com.au/itm/273679759496

Anyone know of local sources where I can pick and choose?