Here are some of my favourite microphone sites
http://www.cinephonics.co.uk/about.html
http://odemar.home.xs4all.nl/microphones/microphones.htm
http://mikrofonservice.at/english.html
http://www.vintage-microphones.de/index.html
http://www.wired.com/rawfile/2011/01/gallery-ribbon-mics-part-1/?pid=568&viewall=true
http://xaudiaelektrik.blogspot.co.uk/