Quick question about cylinder head bolts

I recently completed a valve job on my 2004 Tacoma prerunner 3rz. While test driving notice oil was leaking from the cam chain tensioner port. It had the OEM gasket and I tightened it to spec. Me being a knucklehead I decided to give it a little more snug of a fit and snapped the stud. My quick question is are these replaceable? And if so how? Thanks in advance

 

I screenshot this last night in preparation for replacing my exhaust manifold. Maybe it's the same for this? Credit to @TheFang

 

Thanks I’ll look into it. Much appreciated.

 

A stud is inherently replaceable. Do the double nut or get some vise grips on it.