Yes there is. I just did this on Sunday. I removed the 7 screws holding the cowl on. Then I fashioned a filter out of an air conditioner filter to cover the intake hole. Total cost; Filter=$1 6 zip ties= about .06 cents.
I won't know how well it works for a while butit has to be better than nothing.
Failing this I plan using some scrap sheet metal and fabbing an adapter so I can use an auto air filter instead.
The paper filter will crap out way too quick. There was a thread on here where the guy made a filter/trap for his pcv, it is made of the fiber filter stuff, that would work way better I think but then again we know how opinions are,lol.