im with will on this lol, i bought a new head gasket so may as well buy the bolts too
ps i have reused strech bolts before, cam bel snapped ont he missus old clio, so head off for new valves etc
her old man was trying to find TDC with a needle file... ping - arse it snapped... so head off again lol got it out and put back on with same h/g and bolts lol...
then he dropped summut else in there so had to do it again
re used em again and the car ran fine for 3 years and was still going strong (for a 1.2 lol) when we sold it