If bitfunder "suddenly shuts down" the list is not available because it's on their website.  Though there's always this: https://btct.co/history-bitfunder/ (don't use IE, I don't mirror the superfluous content so it breaks)

The list also does not include any way to contact the shareholders.  (Another Edit/Add: Bitfunder did in fact add this option, just found it in my account preferences!  I can share my email with the issuers!)  

btct.co makes shares/email/bitcoin address lists available to issuers on the site (html), via the api (json), and by emailing all issuers complete lists at 12 hour intervals.