The rubber rollers can be reconditioned for a reasonable amount, much less than replacement rollers if they are available. Search "Urethane Roller Reconditioning" and you will be able to pick from a number, possibly a short drive away. They will peal off the old rubber from the shaft and cast new, then turn/grind to size. Example. A set of Makita 2030N rollers (1980s vintage, 12"/300mm wide) are about $275Cad/186£each. Reconditioned are about $100Cad to $125Cad/67£to 85£each. Well worth looking into and if you like the price pull them off and send them for reconditioning. They will be as good or better than new.
Pete