I have an 04 Outback 2.5 engine. Had shop recharge system, but didn't fix problem. Unit cuts in and out, screeches. Shop said compressor was sparking and has to be replaced. Does this seem right? Recommendation on new vs junk yard? Threads I've read indicate compressor failure is rare. In looking for replacement, what year and models would be a match? Are all 2.5 a/c the same? Looking at new online shows a lack of aftermarket for 2004 Outback. Would 2005 match? Thanks for the assistance. Paul