Find a RI/ICI willing to do the paper work and conversions;
http://dms.dot.gov/search/searchResultsSimple.cfm

Do some more searching and you'll find the .pdf document about DOT reconsidering the eligibility of all Skylines with the exception of 96-98 (R33's).

The data is available to submitt a petition, it's possible and it's costly.

$10,000 got my RX-7 in