Roush sells a "slip-on" filter for each stack. Provides protection and is easily removed. Have seen this on a later >1000 SPF. No hood clearance problems.
I have ordered one to try with my Webers. Below is a picture of the Ram-flo filters I currently have. They may work with your stacks but do not "slip-on." Takes a little time to remove or replace.
I am currently using the screens but they restrict the air flow and only keep ot boulders!
To see the Roush filters, download their catalog:
http://www.roushperformance.com/
It is on the last 2-3 pages of the catalog. I believe the are in the $40 range each. Hope that helps.
Good luck!!