When I was researching this project I came up with the following part numbers referenced to sales codes. I also got a price from my dealer but it must be on a handwritten note in my file. I know it was around $90. I will look tonight.
BNB - Electronic stability control
XAA - Parksense
NEN - Diesel exhaust brake
LHL - I/P mounted switch bank
XHC - Trailer brake control
56054535AA BNB,XAA,NEN,LHL
56054536AA SAME
56054537AA SAME
Checked my records. The part number is 68231816AD. It is for the panel with 5 AUX switches and Traction Control, Tow/Haul, Exhaust Brake, Park Assist. $70 online.