Parts store guru question

[clay68c10]

I have been looking for the right carrier bearing and I'm having no luck with any of the usual resources from NAPA/AZ/Oreilly. They all show the same PN carrier bearing and it doesn't match what I have. I also checked some of the site vendors and I'm not seeing anything there.
I've done a few carrier bearings on 1/2 ton trucks and I've never ran across the type I have now. Ususally it is the 2 bolt flat carrier or the light duty small type.
Did the BBC trucks come with a 3/4 ton part? Of course, no one has the 3/4 ton part in stock for me to compare. The pn that keeps coming up is HB88107A. The bearing inside dia is correct (1.378), but the carrier is totally different.
Here's some pix if that helps.