I did a search and couldn't find much on the subject... my dealer wants $15 for the '03 yz and wr oil filters which have paper elements. Since they probably shouldn't be used more than once that can add up to a lot of nachos. If K&N makes replacements, where can you get them and what is the approx. cost compared to the pre-03 screen units? (The 02 and 03 units look interchangable.) Thanks.