Converting images into Stencils using photo shop or similar

I'm looking for someone who can create for me stencil images that will be used by a laser cutting company, to create stencils in 130 micron polyester board.

Initially the images will be related to items such as a Mobile phone, an IPad, Xbox 360, Handbags and Iconic landmarks etc.

The requirements i have, is that after the stencil has been placed on a flat surface and sprayed over, the image that is left will be instantly recognisable to people. I'm not looking for perfection as such, but good quality work is required.

In the future I hope to expand this requirement to include other images, brand names and bespoke designs.

As this is something i haven't done before, although the Laser cutting company have. I hope we can all work together to get over any initial wrinkles, to ensure the stencil is correctly displayed when used.

I'm thinking that to start with I will need a minimum of 5 images converted, before you ask No i don't have the exact images as yet!!! But I should
have them in the next few days.
The stencils will need to be enlarged to roughly 50cm x50cm, but if it's possible to make them so they can be made larger or smaller depending
on the application they are needed for, this would be fantastic.

I appreciate that at the moment, it is difficult to give an accurate bid for the work, but if you could give me an estimate of what you think it would cost for each image, that would be a great start and we can discuss a final price once I have the exact images.