I found it from the new brand
https://www.bonoss.com/why-use-stud-conversion-kit-instead-of-wheel-bolts-cai.html
It shows how to install it and where I can find them
https://www.youtube.com/watch?v=fi-y5_IpGmo&feature=emb_title
It is a wonderful titanium stud conversion kit ! I like it!