Weather sealing sides of automatic garage door

[agingyoungrebel]

Was hoping someone may be able to advise on how I can weather seal the side aspects of my single paneled steel automated garage door. I have ordered a weather guard to seal the underpart of it, but the sides have a 20mm (aprox) gap between the door and the frame. I have considered using draft excluding brushes so not to interfere with the mechanism of the door opening/closing, but none that I can find sit at 90 degrees to the bed of the brushes so to attach it to the frame, and I also am unsure this would achieve much anyway

I am hoping to use the garage as temporary storage. Any help would be much appreciated.

 

[foxhole]

You attach to the front face of the frame.