I got some stainless steel screws from the local Runnings Fleet and Farm store here for that. They were a pretty close match to the size and shape of the originals and were the correct thread to screw into the threaded washer they use on the backside. Just going to have to do some looking around!
There was a guy selling stainless and chrome hardware on eBay for ATC's, i know he had a set of rear fender mudflap screws, which are the same as the front mudflap.
---------------------------------------------------------
1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....