best of luck then.
you will need to find a cluster with LESS miles than your car. a cluster with more miles wont work or you wll be sitting on the cluster unti you car reaches the number of miles in the cluster.
we can use PASoft to adjust any cluster move up your miles but not go backwards. I have worked with Terra on this and though you can virginize a cluster... its not for miles.. its only for VIN number changes. any mileage changes to go backwards has to be done with removing the eeprom chip and installing a new blank one.
getting a used cluster with less miles is fine because it can be scaled up with PASoft.
its probably not a high priority for you unless the price is right but look on ebay for those cluster. less miles usually cost more unfortunately.