Yeah, I think I paid about $40 AT THE DEALER for new bolts.
None of my old ones were stretched past 108.4, but when you are torquing to 70 NM, then turning an additional 180 degrees, you want that warm feeling that one of those suckers isn't going to break!
Torquing those head bolts that far was one of the scariest jobs I ever did to a car.

DG