Stop in for a cup of coffee

ugh, slight problem. I'm trying to get plates on the Polara. Indiana just changed their laws/policies, I now have to show proof of the original MSRP from the year the car was sold in order to calculate excise tax. Dumb because its over 10 years old and will be 12 bucks regardless but BMV says they wont plate it unless I show proof now... wtf