I found the NSK 6203EU bearing for about $5 online. Better than the $250+ for the whole tensioner.

BTW, I have the two similar pulleys left over from the NW PSK. The bearing numbers are different (different mfg.s), but otherwise they look the same. Of course, those bearings don't sound too great either.....

Any who, thanks for y'alls input. As always, this forum rocks...