I do mine the long way, with pictures of the chip itself and of your design. Then you can use photoshop, paint shop, etc to slap them together. I get the pics of the chip from 5stardeal's webpage because they have larger size versions.
You can also use a scanner to scan your blank chip, then use that in conjunction with a picture of your label.
If you're going to do a custom chip through a company, bear in mind that they are going to want EPS format (raster based) for the images. Illustrator does this, Photoshop does not. Paintshop pro does.
just to correct, EPS is a VECTOR format not RASTER which is completely different.
Most printers would want an EPS but they could also accept very large sized raster files (TIFF etc..)