I have run the frantz on my truck since new. The filter elements have been provided to me by "we filter it". Nice thing about using thier replacements was the elements fit perfect and they were not expensive. Now, along with my standard order of replacement elements, they have sent me an adapter tube that fits over the vertical tube on the filter housing and the filter elements appear to be the same as in the grocery store. Now when I change the element, I waste about 25% of the roll and am guessing that the total filter area is reduced approx. 15%. Does anybody know if there is another supplier of the "prefit" toilet paper elements for the Frantz filter? The "we filter it" people don't seem to respond to my inquiries. 


