There are a few better known breeders in FL. I know that Candy and Carla can remember who they are and might advise. You might have to drive a bit to get them. There are some really bad shipping experiences with both large mill breeders (glider stork) and smaller breeders.
I've had a great deal of experience working with The Pet Glider/Priscilla Price. I've had gliders shipped from their place in TX here to FL a couple times. It's an extremely well run process. I've also been 100% happy with the gliders I've gotten from her. Super healthy, gorgeous. There is a better chance of you being able to work with them one-on-one in making your selection and a greater chance of them having a bonded pair of females for you.