Offers extensive inventory of windshields, windows and replacement glass for RVs, motorhomes, van conversions, trucks and pickups. Duncan Systems, with locations in Elkhart, Indiana, Tempe, Arizona and Lakeland, Florida is the nation's largest distributor of glass and windshields for motorhomes, vans and other RVs as well as specialty vehicles and heavy trucks. Duncan Systems also provides repair and salvage services, plus training for insurance adjusters and glass shops nationwide. rim repair NW indiana