You can order those chips on alibaba. Perhaps even aliexpress.
Could you replace said chip?
If so, just replace, add thermal paste and heatsink, should be good to go.
Pardon if my suggestion isn't the best, just trying to help. Know a good deal about computer hardware but this isn't my expertise.
I don't think it's as simple as that. I have been researching buying ASIC chips from alibaba and noone has yet to even return a pinout diagram..
Looking at some other threads here people have been trying to find a ASIC distributor but BitFury seems to be the only one coming out with a consumer 16nm ASIC.