Our focus is here is to help people on repairing their devices.
We are not setup to do that level of research on BOM costing. While you might be able to gain insight on what your phone contains for chips from the tear downs, you will need to find out the costs from the manufacture of the discreet part if they are willing to tell you.
Remember, they sell the parts in the 10.000's if not more to the phone makers, so the cost for one part will be exponentially more expensive than what the phone maker pays.
I would recommend you do some searching on the web to see if someone has already done this research. They may require payment for their efforts (it won't be cheap!)