I am retired, but my taxidermy methods are always fresh in my mind. You can probably first google for taxidermists in Tennessee or contact your Department of Natural Resources via Internet or phone. They should have a list of folks who are taxidermists. Those who take in mounts for "customers", need a license, so your state's DNR should have a list of these folks.
I see no reason why your dog could not be mounted on a Wolf manikin. McKenzie Taxidermy Supply is one of the largest taxidermy supply houses here in the United States. Google their website. This might give you an idea of your dog mount. Food for thought....a good taxidermist will get all the measurements from the carcass after the animal is skinned. Keep that in mind when you talk to a taxidermist. Also ask about how he/she prepares the skin for mounting. McKenzie has an out standing process for mounts that will last longer than your lifetime, as long as you do your part.
All mounts regardless of type should be kept away from sunlight, heat sources and the touching hands. Groom mounts with a soft brush attached to a vacum cleaner. These are just some of the things that have crossed my mind when I read your post.
In Best Regards:
Skinman
J.D.Gillis