I don't know what "time sert" means but I used a machine shop in El Monte when I built my Vortec 350 Chevy. I bet the NSX engine has lower tolerances so the question is how much precision are you looking for? If it's just basic machining I will hunt for their number. They did great work (decked the block, 3 angle on the heads, bored chambers etc..) for a cheaper than reasonable price.