I would start out by going to my local Lumber Yard or Hardware store I.E. Lowes windows and doors or Homo Depot which pretty much did away with the Good Old Local Lumber Yard in your home town and ask them. Start there then look at your local windows carriers and Manufacturers which I am lucky we have Thermal Windows INC. here in Tulsa, and look at their sheets for sizes and pricing. You may have an Andersen Dealer Or a Pella nearby in larger cities......... 8)
