Meh, that ain't all it's cracked up to be. I wouldn't worry about it. You really think Timken can control tolerances across the globe better than anyone else can?
If it's an HM88649 bearing, it is what it is. You won't be guaranteed a country of origin no matter who you buy it from. Any of the reputable manufacturers will be within tolerance; they can't afford not to be.
Longevity after setup might be a different story, and if you want to use Timken, that's your prerogative. I don't think there's a Timken bearing on the shelf in my warehouse, and I work with more bearings every day than most folks will change on their rig in an entire lifetime.
Set 'em up and go wheelin.