No worries Bud, I am almost positive K&N makes a replacement reuseable airfilter for what ever one you choose, even the triangular ones by Baron...just go to the K&N website with the airfilter dimensions...
BTW I was at the local O'Reiley's-Kragen store and they had a K&N Demo with a ping pong ball in an aspirator tube with 2 two electric fans applying suction. The K&N would float the ball all the way to the top...a slightly used FRAM air filter (I held it up to a light and you could still see light thru it), once fitted to replace the K&N one, the ball would not rise up the 3 foot tube, which was interesting to say the least.