Someone had asked a while back about scrapbook stores in the Disneyland area and I had posted some lengthy info (don't even know if she used it). There aren't any right down the street or in walking distance. I'll see if I can find the post and BTT. There is probably a Michaels craft store in the area, too.
Have fun. We haven't been since the celebration began (we were there in Feb and March) but I hear some fun things are going on.