There hasn't been any new ones drawn up or at least any that have been released publically.
Why would there be a need too when the designs the same?
Having searched the net a lot on this subject the only new picture I have seen is a drawing of the whole stadium that was posted in an article on the Echo dated some time in 2005. As it wasn't that exciting I didn't save it.
Shouldn't take you too long to review the section of the echo devoted to the new ground.