Protecting CSST Through Studs - Are there no off-the-shelf solutions?
The manufacturer's installation manual describes the plate that can be used, and even includes the part number.


  


Which is available at Home Depot, and Amazon. 

It also says in the Protection section of the document "For tubing routed horizontally between studs, striker plates should be installed at each stud, and Flexible Protective Conduit, or other approved conduit, should be installed across the entire length of the run." (see point 4 below), and "schedule 40 steel pipe has been found acceptable by CSA International for puncture protection.". So you could always use schedule 40 steel pipe to protect the pipe. Just cut the pipe in 12" sections, and install the tubing in the pipe where it passes through studs.