Maybe. In any case I would not put an oil of any kind on a belt(including WD40) on purpose. An old trick that works short term is bar soap rubbed on the sides of the belt. DO NOT attempt this with the engine running or it will be difficult for you to post the results .
I had thought that my belts were squeaking; turns out it's the alternator bearing that was the cause (spraying Silicon quiets it for a few days).  o I have a simple (permanent) fix for this, like swaping out the bearing?
Yes you can get just a front bearing. As I am not at work at the moment I can't be specific but it is probablly 20 bucks or less(+beers to do it). I am working tomorrow(7-5) as the dog is hungry. I will confirm the info and post back.