Looking for sliding screen door replacement teach or U channel.

Here is a pic of the actual part that is 79" long x3/4" base x 5/8" on each leg of the U channel. Made of white plastic about 1/16" thick. I need anything close to this 96" long /I can cut to size if needed protruding ribbed insert is 1/4 " big and slides into a track that is made of wood and holds the entire piece into the door frame. I need 3 pieces to insert into the top and 2 sides of a screen doorway. The door wheels run on a standard threshold style bead located on the bottom. I hope you can help me I have no way to find the Manf. Of this product or door system.