@2001LC not sure if you're still curious but I just fitted a Gates 36026 idler and the bearing is the same Japan NSK BD20-15DUL as the OE idler it replaced.
Along with a new serpentine belt I fitted a Gates 36119 tensioner pulley and it's bearing is 6203-88-21E China GBC 64. Might track down another 6203 and press that into the old OE pulley (its bearing is 6203LH NTN). Also found that OReilly's site lists the Gates tensioner pulley for an 03 LX as part #38001, which is a 90mm pulley, however the correct pulley for my vehicle is a 36119 which is 102mm in diameter. Their site has the 36119 as fitting 02 LXs so I suspect there's a bit of an overlap in parts, actual build dates and model years.
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