As a general material, 'brass' is not good bearing stock. As olderdan states bearing bronze has desirable qualities sought.
Bronze bushes are available in many diameters and length combinations. The Industrial Revolution and machine age ran successfully on bronze, and many of those are still operative. Bronze stock or manufactured bushings can be modified as needed; oil grooves/ ports, thrust faces, split diameters, even adjustable. Machining, installing, and removal practices are easy. Main issue is attaining correct diameters, not only round but cylindrically straight.
Roller components if selected for RPM and loading are good as 100%; if sizes are compatible. Shafts and housings are sleeved all the time in repair shops when they wear from seizure. Sleeves also adapt when exact sizes aren't available.