Current Apex software. Need Driver for Marantz SR8012.

RTI shows Denon driver 1.83 to be best choice.

The equipment is located well away from the HT room and I want the entire remote available on my T3X for set up and other purposes. All I find in the driver data base is bits and pieces, but even commands like sources aren't obvious.

Is there a short answer for what I am missing or am I going to have to build all this manually?

I have been programming RTI remotes since RTI first started, but freely admit to being a newbie to Apex.