They are a public company (symbol: WSM) so you can pull up their SEC filings. A variety of sites allow you to do this for free but you may need to wade thru advertising and a registration process. I have used
www.freeedgar.com quite a few times.
Look for the 10K (annual report)
Once you have the names, you "might" be able to surmise their email addresses if you know what convention/pattern their email system follows. Or, you can always call their information desk and ask.