Do you utilize the sorting feature in Customer Manager like you should? Before you finalize your Mailing Selector, choose a time period (say a year or 18 months) and sort by who has made a purchase.
You can plan to mail or hand out catalogs to those--but then take the list of who hasn't placed an order in the last year and send them a quick, friendly email asking if they are still interested and letting them know the new catalog is due out shortly.
Life gets really busy and people forget. You'll be pleasantly surprised to hear from some customer friends who are ready to get back into the hobby they loved so much.
Take a minute this catalog period to LEARN to use your Customer Manager tools. They were designed to make life easier!