The ROM for the Imate K-Jam is available on Imate's web site and the K-Jam is a WM5 QVGA device. Unfortunately you need to have a K-Jam (or at least the IMEI of one) to register on Imate's web site. I haven't got a clue about how to extract the files from the ROM, but you can probably find someone with a K-Jam who can download that ROM at
www.howardforums.com in the Pocket PC forum.
I'm dying to get OzVGA working on my Jasjar, so hopefully this is at least remotely helpful.
Brett