most of the cluster re builders places on ebay can correct the mileage. ( they have you sign a waver to change it) not sure how its done, but the miles are stored in the cluster, or the dic in your case.
maybe worth a few pm's to a seller or two of repair work to see if they can do your dic. if you cant figure it out on your own.
what most will do also, and is legal, is to put a sticker on the inside of the door jam with the old dic miles, and then the new miles, so you can figure out what the true miles are.
