This script has been designed for our databases in our environment, but it can easily be modified to suit your needs. unfortunately you will have to be familiar at a fairly advanced level to make your changes....
briefly put the principals are: go through every database that is not a system one, check if it contains the table you are looking for (we have a number of similar databases based on a template), check if it contains the right columns (exculded in this version), then see if it finds the string you are looking for.
please note this is very specific to our work environment and you will have to make changes. if you need help just contact me and i will see if i can help.