My 10 year old 2nd hand Outback drawers are as quiet as a church mouse, as is the 2nd hand Autosafe full cargo barrier.
If you're going for a single drawer with a false floor, I'd be going the same way Matt150 did with the Drifta drawer.
Edit - I now get what you mean with the rubbing on the tailgate as it is drop down. I'd call Luke from Drifta and ask them.