Alright lets get started.
#1 As it was in Florida your wife took and passed an MSF course, she does not need the card to show to the DMV/Tax collector which ever one your county uses for license purposes, when she passed the course -written and riding the instructor enters the information into the Florida data base and she has one year from completing the course to get it on her license .
When she first attended the class she had to give them her drivers license which the instructor entered into the data base so all is well, I do this week in and week out if you have any questions drop me a PM, where in Florida are you?
And as for the guy saying he could not give a replacement that is pure BS .