Hi weddyperry and welcome
to ATP. We aren't a commercial nursery site, this is a free site where gardeners talk about their plants.
Most mail order nurseries will send you catalogs free. You just need to contact them and ask. Be warned! Once you start getting catalogs in the mail you will get more and more, for years and years!
But most of the people on this site probably order their plants online, without a paper catalog. The pictures of the plants are much better on the websites than in a catalog.
So, first what kind of plants do you want to shop for? Google them and you will get dozens of nursery names. You can e-mail them - look for "Contact Us" on the home page and ask for a paper catalog, or just shop their websites and order directly.