Update:
I have some great news. Was able to successfully complete this conversion today doing upgrading from an aux in the armrest to aux/usb, as well as going from regular CIC to a CIC with combox!
It is an amazing feeling to get this done as this is a project I have been wanting to knock out for 4 years now.
I am currently without bluetooth as I need an adapter for the existing connectors for that as they are not PNP with the combox, but am hoping to have a full write up for anyone else who is interested in also undertaking this project with pictures (pending adapter), explanations and contacts by next week.
Stay Posted! Until then happy weekend