http://www.microsoft.com/windowsmobile/activesync/default.mspx

 There's the link for ActiveSync, which'll get you up and running and able to install programs to your PPC from the desktop.  That and Outlook are the two big things that usually come on a pocketpc install disk besides a few utilities.  You'll want Outlook so I'd set EBay search to email you when new items come available.

http://www.mobilitysite.com/ 

Mobilitysite is a great resource for PPC owners.  Who knows, someone there might have an install disk available for you.