Weather gasket at bottom of metal w/foam core exterior door
Thanks for reaching out to us. We unfortunately don't sell this exact bottom sweep, but you might be able to use our 58-176 as an alternative. This just wraps around the whole bottom of the door and installs on the sides via screws. Look it over and see if you think it's worth trying out.
Perhaps you might know another manufacturer that does stock this weatherstripping?
I don't believe your exact weatherstripping style has been made in a long time. If anyone might still have it, it's the original makers of the door, whoever they may be.
The 58-176 is a reliable standby. I recommend it a lot because I use it a lot. As long as your door is 1-3/4" thick, and as long as you can drill holes in the side, it's a great alternative. At the end of the day it's easier to drill a few holes than to try to track down a part that may not exits anymore.