Mike - not sure if there are any NTN dealers that can get either of those two p/n's. And I doubt we'll get any response directly from NTN.
I did some more digging and found out that Mazda uses a similar bearing, NTN p/n 4T-CRI-0822 (Mazda p/n H266-26-151). Same dimensions and load rating, but has built-in seals, I think. Not that this has anything to do with Suby's.