Fork gaitors on E bay.

[GoldOxide_imp]

Maybe I am wrong, but the top shelf gaiters, like from Kawasaki and Triumph, are a rubber composite (or was it pure industrial rubber?) that outperforms the plastic alternatives. They are not cheap $$$, but worth the investment since they appear to last. I had the Kawasaki offering installed on the 2014 CB1100 and the bike was not sheltered from the sun day in and day out Monday through Friday in the profuse, hot, humid and blazing summer sun for years.