To anyone that wants to just replace the bearing in the belt tensioner pulley, use this info. I did this last night and it went very smoothly. I dont have any pics but its really easy. Just source a bearing of:

ID: 15mm
OD: 35mm
W: 16mm

I sourced one locally.

Mine was getting loud like alot of other of the ancillaries (high mileage). Hope this helps some save some cash. A new pulley was about $65 if I believe. The bearing was about 20. It took about 2 minutes to pound the old bearing out, and 30 seconds to tap in the second one.

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93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K