Me isa pang solution dyan, bili ka ng caliper... yung Number bearing is the measurements ng original bearing mo. Kunin mo lang yung inner & outer diameter, and last is the thickness of the bearing, which will comprise of the 6 digit part number of your bearing. Or kung me bearing center ka na alam just bring the sample, I'm sure na alam nila yan... KOYO and NSK bearings are good brands from japan...
If your worried na di sya original, mitsubishi themselves don't make the bearings. They usually have it subcontracted to other jap companies like KOYO & NSK and stamped with the mitsubishi Logo. In my experience...