Drivers side Rear Seat belt

I need to replace this and a lot of sites I look at does not have this for sale...So right now my two options are going to a junkyard or going to the dealer...Anyone know any sites where I can find the seatbelt at, and what price range it will fall in.

before you replace them there was a recall on the rear seat belts. I bought my car used from GM and never got the notice since I was the second owner and have never got them replaced. Check this item for the recall information first before replacement ---it may save you some money.