These door bottoms always end up being a problem! It seems every manufacture uses their own type of weather strip and no two are interchangeable, which can make replacing them a huge hassle.
That said, we have a couple types I think you should check out that may work for you. Take a look at our 58-009
Bottom Prime Door Sweep, and our 58-174
Prime Door Sweep. Compare their measurements to your sample and see if any of them would be an ideal replacement.