17 R1, 2014, part number for the 3 pipe cpu heatsink?

@mattyb3​ I know this is a 5 year old thread.. that being said.. do you happen to know the part number for the 3 pipe cpu heatsink? I have recently done this upgrade to my 17 R1, and managed to get a 5 pipe heatsink from a seller off ebay for the GPU (880m/8gb) and it works fine, but was looking to get the "factory" 3 pipe one for the cpu.. i have the 4940mx installed currently, and the fan does kick up during load, but basic tasks do not raise the temps too much.