Do you have a metal door (about 3' wide) similar to a garden door- to separate my laundry room from garage because of a huge dog.

Yes they do

Check the Lowe's website. On the website, search for 3' metal doors. Usually, that's what we do. A lot of times they won't have it in stock but can have it in within a few days or so. After hurricane Michael, it was impossible, to go to the store and get help, because there were so many people there. The website helped us tons.

Yes

I wouldn't count on them having exactly what you need in stocks because they do a lot of special orders for doors and windows, but they can undoubtedly get it