In the past, we provided a free version of the Lync Widget, including source-code.
We do not offer support on this version anymore. Today we have a new stable version focused on Lync 2013. We offer this product in combination with professional services to install and configure it in your website/portal. You need a Lync 2013 on-premise server (does not work yet with Office 365).
Implementation projects typically cost between 2800 to 4000 EUR excl VAT.
More info on our tariffs can be found on: http://www.orbitone.com/en/how-we-do-it/#1463