Desktop research on online shoe stores business models

I need someone to do desktop research for about a day and collect as much relevant information from open sources on the Internet as possible. Research topic is business models and modes of operations for online shoes stores.
I don’t need any presentations or reports put together. What I need is a structured list of links to articles, PDFs and PowerPoint presentations that help me answer questions from below. This list could be put together in Word, Excel or PPT. Would also be helpful if key quotes/takeaways were summarized somewhere next to each link, especially if some articles are very long.
1. +/- of various online shoe business models (in case material isn’t available on online shoe stores, clothing business models could also be used as examples)
a. What share of online shoe retailing take up niche/boutique players (e.g. Bakers Shoes – targets young women)? Can use the US, UK and other developed markets as examples.
b. What type of buyers shop at boutique-like sites vs. the large selection sites (e.g. Zappos)? Any substantial difference in shopper behavior and profile?
c. What are the most vivid examples of successful niche/boutique shoe retailers in the US, EU and other markets? What are their revenues?

2. Sourcing shoe supplies for online shoe stores (in case material isn’t available on online shoe stores, clothing business models could also be used as examples)
a. Any difference in sourcing strategies between boutique and large online stores? What size orders are usually placed?
b. What are the key sourcing strategies of boutique online stores? E.g.:
i. drop shippers,
ii. low bulk orders from Chinese trading companies,
iii. working directly with manufacturers and wholesalers in home country
c. What are some of the advantages of various approaches?