I used something like that at work once but dont know where it came from. Its just a bolt that has been drilled and tapped on a lathe. Its nothing more than that. Just make one yourself or pay newman a couple buck to do one up for you. What is the application? If it is non structural then it will be real easy to make out of grade 2 bolt. Material will be your only concern as far as modifing a bolt really being practical so what is it for?