Undercarrage idler bearing/bush

The idler bearings on our 1150B dissapeared . The center of the roller is worn away . It only does 100 hours on a very good year but runs like a sewing machine .I was thinking of doing a cheap fix with either flanged oilite bushes with ID 60 mm and OD 75 mm or BU type split bearing bushes (dry running type) or am I too tight with the pocket ?

Undercarrage idler bearing/bush