Wow the PMDG Operations Center is probably a program that is important for this plane, too bad it can´t be downloaded from PMDG website directly and installed.
But the good news is - there are more than enough liveries:
https://flightsim.to/c/liveries/pmdg-dc-6/
Not bad not bad 
I don´t know which liveries are fictional but they look realistic and good:
https://flightsim.to/file/20712/douglas-dc-6-us-navy-131618-vr-52
https://flightsim.to/file/22181/pmdg-dc6b-rcaf-17515-tribute
https://flightsim.to/file/19098/pmdg-dc-6b-american-airlines
https://flightsim.to/file/18801/douglas-dc-6-british-commonwealth-pacific-airlines-vh-bph
I have to check how installing liveries works with OneStore airplanes, community folder or OneStore folder just like the Carenado Mooney. But it looks great!
Maybe there is a livery that comes with a different or interesting modified cockpit too like the Cessna Citation CJ4.