Finding a self driected solo 401k bank

I'm not too good at describing this so I might mix up the terms a little bit but you should be able to get the idea of what I'm asking. So I set up a solo 401k with quest ira, now I'm looking for a bank place my money at. Does anyone know of any big chain banks that do this and how to describe this in English? Someone recommend me US Bank, I called US Bank and they even talked to my IRA attorney where he translated everything I could say correctly and they never heard of it before but they were going to ask a different department, they called me back and told me what department to call, and that department told me there was no such thing lol... Any ideas?