seal gaps top and bottom where the doors meet.

I'm not sure how you would define "better," but we can try our best to find something for you. Let's start with what you have in there now. I'd like you to remove a sample of the existing weatherstripping and show us a picture of its end profile. We should probably determine if we can even replace anything for this door before we start talking about quality. Let me know! The video below may also provide further insight on the kind of information we need to move forward.