This front fender is made out of steel and is chrome plated, it came with the bike i bought outside Finspång but I am not sure it belongs on a motocross bike. It might originally belong to a enduro model, perhaps a 360 Sportsman.
Front Alu fender reproduction from Sweden.
Rear aluminium fender, new production from Sweden.
Rear aluminium fender from http://www.vintagehusky.com/ super quality.