If none of the places in SD are what you are looking for and you don't mind the drive... my grandparents live in Escondido and when I went to visit, I stopped by this store: Scrapping Cottage
www.scrappingcottage.com
3144 Skyline View Gln, Escondido - (760) 747-7282
I liked their selections and I believe they hold classes during the week because I was there on a Saturday and there was an area that was closed off in the back. HTH