I have an Oct 2005 (Rev E) 15" Powerbook G4 1.67 Ghz. This is the very very last model of Powerbook released just 4 months before the MBP. I need a new PRAM battery (it's not remembering the date/time) and I can't find one anywhere! Ifixit.com doesn't have it. OWC doesn't have it. NewerTech doesn't have it. All the ones on ebay are only for the Rev A - Rev C models. None for Rev E. Anyone have a source for these??