LONG ago, I got bit by suppliers by ordering a few different sized bearings, trying them out with plastic-gauge and they wouldn't take back the 'measured' ones that didn't get to spec.
And YES, I did clean the wax off with cleaner. It was the slight burnishing on the backs that they didn't like. They said "it's a SPECIAL ORDER and we can't sell a bearing that's been INSTALLED in a ____"!
SO kiddies, Find a 'good' supplier that will know how to help and get you what YOU need!
E