I threw my mud flap away 4 years ago... but, this is what the stock '01 fender looks like minus the bolt-on mud flap...
Like Paul said, you might get lucky and find someone to trade, or maybe a wrecked bike even.. if the stock part is too expensive new...
I LIKE the mudflap idea. Just curious why you took it off. I've had bikes that crap on everything on the rear carrier. Now, even the current Bandit puts crud on the bottom of the rear Givi in the wet.
Brings to mind a ride many years ago when I was using the crude black molybdenum chain lube of the day. I took my current main squeeze out for a ride, (of which I was mightily enamoured or lustified). She was wearing a whie nylon shell. The recently lubed chain striped her right up the back... reverse skunk style. The only way to get rid of molybdenum stains is with a welding torch or a large grenade.
It was at this point that I cut out a piece of rubber & put an iddy biddy flap on the chain gard. Everyone though it was hillarious, but I knew.
I put a flap on an H2 back wheel fender for the the same reasons. The trouble was that at speed the dam thing must have ocillated badly and the rear wheel ate the center out of dam thing.
Perhaps the same thing happend to you.
Another Mike... always glad to hear from family, (same name, right?)