For everyone that´s not in fear of a little copy & paste work, here´s a short tutorial that explains, how to create a customizeable tab (Custom Tab).
Within that tab you’ll be able to display any html page you´d like to. (it´s also called iFrame html tab)
The whole process doesn´t take longer than 20 minuntes and you´ll be able to have your shiny shop beeing fully operational for your fans: