Original pulled Twitter icons from web (not possible in FP) and default icon is lost, using replacement based on screenshots:
https://web.archive.org/web/20180203011150im_/http://babarageo.com/cgi/wp/wp-content/uploads/2011/12/tweetclub.jpg
https://web.archive.org/web/20170321174432/http://murigee.com/1147/
