Moz, I don't think anybody puts something on the market but its easy to make,
Attach about 3 or 4 short pieces of tubing inside the fender well find some tubing that slides in it attach that to a strip of rubber or some kind of flexible plastic slide it in place drill some holes through both sets if tubes and secure with hairpin clips.
Then you can take them of in a matter of a couple of minutes on tight trails