Just make sure you properly store the fish while you're looking for a taxidermist !
Lay all the fins flat and wrap it in a wet towel then in a plastic bag , try to freeze it in a flat position .
The old school way was in news paper but thats not recommended any longer .
Think about a pose you want before you get to the taxidermist and do yourself a favor and let them choose the show side or the direction it will be facing , they will look closely at the specimen and consider the scale condition and markings on each side as well as the fin condition .
If you have a photo of the fish before it was frozen take that along too , sometimes it helps to see the fish in it's natural colors .