Sadly, most times when a company is bought out, all of the inventory of parts from the bought out company are often scrapped making repairing old legacy products difficult to impossible to repair. Sometimes you get lucky and a third party buys out the legacy product parts and resells them as NOS (New Old Stock).
If no one can point you to a NOS seller you might need to find a machine shop or home hobby machinist with at a minimum of a lathe to turn new rollers for you.
Machine shops are getting pretty rare now days but a Internet search of Yellow pages for NH gave some results..
HERE