Original aluminum extruded Marinette window tracks can be ordered directly from Tom Althouse at 619-208-6458. He's now shipping 96" lengths since FEDEX is charging an extra $150 for oversize freight for the 108" lengths. Plastic ones are for sale here. If you would like to purchase double tracks which do not allow for screens you can get the plastic ones here, or aluminum here or here, It is also recommended that when reassembling the windows, reverse the screens and glass so that the screen is on the inside, and be sure to caulk the bottom of the track where it meets the aluminum of the boat as well as the screw-holes to prevent water from getting inside. Below is an image that shows where to cut a drain hole in the tracks to allow rain to run off onto the gunwale.