Sorry for such a late response. Hadn't noticed your post before.
Anyway, the last ROM released by i-mate, back in Nov. '08, was v1.77 (WM6.1). It is the one I have running on my old phone since then. You can download it from this location
. It is the original file, mirrored, since i-mate has closed its doors a couple of months after publishing it . Be reminded that, in order to flash a ROM on your device, you must have the ROM Lock code. It is a 15-digit code (but different from the phone's IMEI), which came printed in your phone's original box, as well as in some stickers loose inside its user manual. Otherwise, the EUM SFX file, which you'd run after unpacking the downloaded file, wouldn't let you proceed. Oh, you must have either ActiveSync (for Windows XP) or WMDC (for Vista and 7) running on your PC as well. Connect your phone to your PC, run the EUM SFX executable file and follow the prompts.
Please, let me know if I can help you any further.