If you can do it, you are the guy that I'm looking for.
Then I need you to explain to me the steps so I can to restore the original database (and site template) to explain how the injection is done.
The testing site for this work is: www.develtesting.info.
I can give site structure and DB structure if needed. The template is clean, created from a fresh backup and it can be restored without problem if needed too.
The decision will be defined according to the time to do the job, to explain it and the best price.
Later you could be eligible for a total site inspection (over the actual version for this template).