Share 'Silk Screening: where can I get Stencils online???'

Hi, I've just started to work with PClay, and I'm a little bit lost... Seen your lesson about Silk screening, and I love the effect you get on the black clay! But I'm from Spain, and here is very difficult to find some materials, specially for Clay working (not much people discovered it...); so, I would like to know if there is any online shop where I could get some stencils like the ones you sho…