Hi –*glad to hear you're enjoying the mag!
N-Photo have a shop on their website. Here's the link:
http://www.myfavouritemagazines.co.u...ent/lp/nphoto/
Unfortunately they have sold out of some of the earlier print issues (I've seen some for sale on eBay if you really want to get your hands on them), but you can buy earlier issues in digital.
Hope this helps!