Hi,
Depending on the size you've desgined in and any special features you may have requested on the metric spherical (if any) you should find that the following brands are available in the USA and SA
SKF, FAG, NTN, KOYO, McGill (single barell roller type)
There ar many other brands of course...
Have you considered a hybrid bearing in angular contact format? If the load is only in one direction then a single angular contact would be fine. Si3N4 ceramic balls would give the insulation you need and ABEC5+ steel rings would give you the speed/accuracy for 10,000rpm. Currently 100% Ceramic...