Took a chance ordering some filters from K&N, hoping to replace the paper filter media on my 3 bolt blue SU filters, and it paid off! K&N part # E-9144 will fit almost perfectly ($30/ea from K&N). Cut through old paper element, seperated the halves, and was able to remove the paper and peel the old glue, leaving the metal housing pieces. With a little tucking on a flat surface, new filters fit snugly in housing. New combo is slightly thinner, but shouldn't need more than a washer to install using original bolts, and should give much better flow while retaining mostly stock look.