Where to get photos of products to use as a demo for shopping template?

I have a shopping cart template I am building. I would like to get photos of products in the same category to use as products for the demo template. Where do I get such photos easily?

I have seen some ecommerce templates on Themeforest and they have some nice dazzling photos. I would like to get similar ones. I checked out some photo sites and was still unable to get a collection of nice photos.