Certainly Cuetec made it to his spec but they then started a line. I believe you can buy the same cue as SVB plays with. Whether his cue is actually a handmade one-off and the rest are mass produced, I'm not sure, but I don't think so.
Shane has stated several times that his cue is an off-the-rack Cuetec. it was NOT made for him. The 360 model that he uses was developed BEFORE Shane became a sponsored player and he had ZERO to do with the design and construction.
He might have tweaked it himself as Earl was known to do when he was sponsored by Cuetec but from what I have seen Shane has been clear that he pretty much uses the same cue he was handed.