Try this...1... Log in to Cafepress...2... Click on your shops 3... Click on products to find the item that has your logo / image4... Click on the product s picture5... On the right side, it shows you the image, it says view larger image , click that.6... Then you can right click on the image and do save image as Now you have a copy of your image and can put it on Zazzle.
I m afraid it is not possible. The way xtal describes you can save the image, but it will be in 400x400px only, which will be also in with a resolution of 300ppi not enough to print it on zazzle products.But you can try to save the images as described and try to trace them with illustrator or inkscape if the designs are graphic designs.
