Hi,
I made a physical bitcoin design and it's now available to purchase on shapeways.
Default material is steel gold plated but if you want to get it cheaper, there're plenty of other materials to choose from (like plastic).
The coin is 26.5mm x 26.5mm x 4mm. Shipping is free on shapeways.
http://www.shapeways.com/openfile/316756/photos/photo48501.jpg