I have been a big fan of WeatherTech floormats for some time. I recently reached out to the company to implore them to design floormats for the Model S, and received the following response:
Thank you for your kind words. We appreciate your support, and your patience. We have actually partnered with Tesla to provide Tesla branded FloorLiners and Cargo Liners for the S-Model, and they are soon to be available
HERE
The part numbers are listed below:
101929000A 2013 Tesla Model S – FloorLiners
101928900A 2013 Tesla Model S – Frunk Liner (front trunk)
101929100A 2013 Tesla Model S – Trunk Liner
102437000A 2012 Tesla Model S – 3[SUP]rd[/SUP] row foot well
It seems these are all currently available in the Tesla store today except for the front row mats. Unfortunately, it doesn't look like they will be secured to the floor in any way, but it's a start! And glad to know that Tesla has partnered with a company that has such excellent products (and made in USA) to develop and produce its all weather floormats.