Good morning,,,do you have access to or have a shop?,,vice or press?,,,if so I'm sure that bearings are available with both the inside and outside measurements ,,,press out the old press in the new,,,also try Jim at rapid repair,,,or parts for scooters,,,if they don't carry the links they may be able to tell you where you can get them
I had to machine the top of the link to press out the bearings. the bearing are pressed in then the bearing are swedged in with a fold over to keep them in. once you remove the fold over there is nothing to keep them in. I believe they are meant to be replaced and not rebuilt.