Hi Danijel, glad to read you again.
Windshields, uh? That's a problem, there are no more original ones around, you'll be lucky if you find the "fly" (small) one.
Otherwise, Ermax produce something for the 01, but I personally don't like it because it's too big.
About the oil, I don't think the slipping is caused by it, anyway if you want to change with something better you have to try Silkolene or ProRace.