Customise WP/ShopperPress plugin to scrape content and publish as a product

I have a wp site, using ShopperPress, which has been customized slightly. I now require the following: - the site must scrape content from another site (image, price, title and other info) - that content must be published as a new product within ShopperPress - visitors must be able to generate these new products themselves too from the front-end i.e. enter a url of the page to scrape - products will expire - products will be listed correctly based on mockups Please