Shower door drip plate and rubber sweep

The metal drip plate attaches with 4 screws and measures 27 and 5/8 inches end to end, but 26 5/8 to the notch that was cut out by the installers. The metal part is fine. However, the rubber sweep is rotted. that is really the only piece I need. It is 25 inches long and the channel or groove it snaps into is 1/8 inch wide and the rubber sweep when snapped into the channel lays flush with the drip plate and when attached to the shower door with the screws is a tight fit as you will see in one of the photos. I hope you can help me identify what I need to repair the shower drip for my framed shower door. Cannot see any identifying number or name for the door manufacturer. Thank you.