Most MBP displays are supplied by Apple as sealed units, and only to authorised service providers who are contractually obliged to fit any such parts they sell. I actually can't find any MBP iSights on the parts list, though they are available from MacBooks.
As for your question, the MBP screen is not exactly the same size as the PB (15.4" v. 15.2"). I tried a 17" MBP panel on a PB/ It worked very briefly, then stopped. You might be able to find an iSight from an MBP if you ask a service centre. They might have a cracked display going spare. If the display housing is also damaged, it is largely worthless (except the camera could be intact).
Xplain's use of MacNews, AppleCentral and AppleExpo are not affiliated with Apple, Inc. MacTech is a registered trademark of Xplain Corporation. AppleCentral, MacNews, Xplain, "The journal of Apple technology", Apple Expo, Explain It, MacDev, MacDev-1, THINK Reference, NetProfessional, MacTech Central, MacTech Domains, MacForge, and the MacTutorMan are trademarks or service marks of Xplain Corp. Sprocket is a registered trademark of eSprocket Corp. Other trademarks and copyrights appearing in this printing or software remain the property of their respective holders.
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.