It has to be a frictionless bearing, but the standard dimensions do not fit into your design?
You can get any linear guideway! Typical out of through-hardened bearing steel. Single piece rails can be produced up to 6000mm (inductive hardened) resp. 3000mm (through-hardened).
We sell competence and know-how, not standard products!
Remark: In order to quote the correct and comparable product it is absolute necessary to specify the demands for surface quality, grinding pattern, runways, accuracy and application.