My garage door bottom seal is failing and at first I though I just need to replace the seal. But I just can not figure out how the seal is attached to the retainer. The retainer is plastic and on one end it is falling off too so I am thinking of replacing the retainer too. But I just have a hard time to find the compatible retainer. It just looks different than the retainers in the market. At last I went to the manufacturer's website and found that Manards carries their products. On Manards website I found this retainer from Idealdoor. It does not look the same with the existing retainer but it might work? I attached a few pictures and can someone shed some light on where to find the right retainer for this door?

Thanks!

This is the retainer and seal from Manards.

Ideal Door® Aluminum Astragal Retainer Strip Weatherstrip at Menards®