Osborn Bearings are available in the UK through YB Components Ltd

Osborn Load Runners cam rollers are specially designed to tolerate both thrust and radial loads for heavy-duty applications. Using tapered roller bearings or deep-groove ball bearings, these  rollers are engineered for convenience. Along with Osborn Load Rails, precut and drilled to your specifications, Load Runners are the complete solution for linear motion control.
Tapered bearings for thrust load tolerance
Sealed to keep out contaminants
Sizes from 1/2″ to 10″
Modifications include relube provision, high temp grease & seals, non-metallic tread