Webshop is located on an old TERENA webserver:
ssh godzilla.terena.org
cd /pub/www/www.terena.org/webshop
Invoicing is provided by GÉANT and the code for this is on:
/usr/local/share/php/Webshop
Payment is provided by DocData and the code to communicate to the DocData PSP can be found in the file:
/usr/local/share/php/DocData.class.php