Everest

So my 2005 Specialized Enduro Comp is making a sqeaking noise. I have narrowed it down to the saddle or seatpost collar (it's not the saddle as I just switched it out for one I know is good. Anyway from what I have read on MTBR.com both of these parts are problem areas on this bike. Is there anything I can do to fix this should I try to grease the collar or something? Eventually I will probably just replace both parts as deals come along but am looking for a temporary solution till then. Also with the seapost collar how do I know what size I need? The bike has a 30.9 Seatpost. Thanks for any and all help/suggestions.