Another place you can check is http://www.favecrafts.com/
very simple stuff. often it's sponsored by styrofoam.com, so they tend to use styrofoam stuff, and various paints.....but it's great for patterns and ideas. Organized by lots of "types"....if you're looking for christmas ideas, or holiday ideas, or bedroom, or bathroom, or kitchen, or by knitting, crochet, painting....
I use it for ideas and the occasional pattern.
You can also buy stencil material blank, and cut your own stencil if you have a computer to print out a design on.
To make a cohesive house, you can choose one or two designs and use them in different colors or sizes throughout the house...stencil on signs, chair backs...embroider or crossstitch on towels...stencil or embroider on curtains, etc. Emboss on copper or aluminum sheets for your cupboards, or framed for wall art....ot punched in tin sheets for same.