Anyone know any good wrecking yards in southern Ontario??

Nigel is not pick your own, not really what I would consider a wrecking yard. He buys, sells and parts cars and will get you what you want. He for sure will not part a valuable car.
He has good quality parts at perhaps a touch above over average prices, but generally speaking, you get what you pay for, and Nigel, to the best of my knowledge, doesn't sell parts, not worthy of selling, unless priced accordingly and stated the condition.
If you're looking for a bargain, probably not the place to go. But I certainly would recommend him.