So I have a kohler toilet with a "kohler" aka fluidmaster fill valve model 703. The part number is 84679-AA. Kohler says I have to replace it with part 1068030. I agree that would work. But I currently have a metal riser that I would like to keep because that part isn't leaking. Part 1068030 has a plastic riser that clicks into the fill valve rather than screws. In fact, all of the fill valves I can find have a click in mechanism to the metal riser whereby I need a screw in mechanism. Any ideas of where I could that would be appreciated. Oh and it has to be 11 inches or shorter. Lucky me. Thanks in advance for any advice.