Moved to a new home: http://newbiescale.com
I have my diorama base pre-made. I used a laser to cut the individual parts and glued them together. You can see the process of creating this base here on Imgur. I have three bases ready to be created like this one. Unluckily I managed to drop one of those to the ground and damage my early built Panzer where I wanted to create new diorama.