Here is one
100 Mile House
https://www.facebook.com/freedomfarmbc/
There are lots of good livestock guardians, Anatolians, great Pyrenees, caucasian shepherds, hell even german shepherds.
Each breed is different and bred for a different purpose.
But the best thing is to contact each of the breeders you can find and find out from them what their dogs are good at.
Some dogs are very aggressive (anatolians), some are pretty selective pyrenees etc.
It all really depends on different situations. Size of property, structure, what's on it and so forth, what they are guarding against.
Each dog is good at specific things, I don't think there is a dog that's best at everything.
Also do you want one, or two dogs. At least two dogs is much better when guarding against dangerous animals, wolves, bears, cougars.
Solo dog is really bait, if you ask me.
I think even here on HBC there are cattle farmers that may have or know people with LGD breeds for sale.
gcreek, maybe skinnercreek will have some feedback or know someone.