You almost need someone to send you the 'scrapbook' pages out of the phone book, there are really that many. I'm not sure where you'll be in SLC, but one of my favorites is the
All My Memories Retail Store in Draper. I primarily purchase paper and supplies (like Stickles, Mono Multi, ribbon, etc.) but I do occasionally find a stamp I like there too. I don't know how far you're willing to travel, but there's an Archiver's in Provo...definitely worth it, if you ask me.