There is a Great Dane Rescue Organization in Melbourne,Fl. called
"Magic Great Danes"
You can find them under "Rescues" on Petfinder
They have Foster Homes and do a Great Job...
There is also a Great Dane Rescue in Ft.Lauderdale and also near Bradenton...
Please Check Petfinder...They are ALL on there..
Good Luck
I hope that you can get more info & Pics posted soon.....then we could forward for your friend