Some LGD rescue will place a working LGD in a farm home.
I have a mesh fence with barb wire on the top and we watch the girls climb over with ease. When we had the hotwire, they stayed in. Mesh fence with a stand of hotwire on top is ideal. Search for "LGD Rescue" and email them and tell them your situation. Put the word out to rescue and LGD breeders. Look on craigslist. There is one out for you, but will have to look for him or her. You will have to pay for one. where do you live?
I actually have two. I have two GP. They are young, but since getting them, we haven't had a single raccoon even stroll by. It's ki4got who was thinking of getting one.
I did try the rescues, and not a one in my area would adopt to a working home and without a mesh fence. Electric was not acceptable at all.