Create a Customer List - Responsive, good pricing

Hi there, I am interested in creating a list of customers (customer name, URL address) that have used Shopify as their platform to build their e-commerce websites. Thus far, I have been unable to purchase this list. We believe that Shopify customers could be identified by searching for the term "powered by shopify". (e.g. [login to view URL]) However, not all Shopify customers are include that text. We may also identify customers through code unique to Shopify customers (perhaps in Shopify's shopping cart?) As a secondary goal, we need to populate list with contact information. (Contact email, link to contact us page, owner name, phone, address.) In sum, we need: 1. List in Excel of websites developed on Shopify (name, url address). 2. Populate list with contact information. (email, link to contact us page, owner name, phone, address) Please include cost of first objective, second objective and a combined total cost. List is time sensitive. Responsive requester.