In terms of building a list of people to send your catalog to... it's a matter of collecting names and addresses from visitors to your store. This is a little trickier than simply getting people's names and email addresses but not impossible if you offer a good enough incentive.

In any case, don't underestimate the ROI from developing an email list and sending subscribers a regular email newsletter, as well as regular offers from your store. I'm sure you have an avid customer base who are keen to hear all sorts of things about swords, sword craft, historical information about swords, and so on.