LMTV brake dust shield

I have conveted a 1996 m1078 into a plow truck with a 10' front plow and a 9' wing. The problem i am having is getting snow and ice in the brake drums. Can anyone help me with a part number or a place to get dust shield for the brakes?

Ive had the same problem I have trucks with covers in the fleet, it doesn't help much if any thing makes problems worse. I like leaving the covers off makes brakes easy to clean and get heat on with a space heater when its cold out.