Ronin,
I've got the EPC, the VIN numbers on it do start with WDB but not necessarily on the truck itself if it's older. My Mog is an '83 and the VIN on the chassis is only numbers but it still works in the EPC. If you provide the VIN I should be able to get you the info you're after.
A number of us with Mogs and Rovers are headed to Whipsaw (Princeton) on the coming long weekend, why don't you bring your Mitsu or G along?
Pete