My Danby A.C. unit hose disintegrated and short of buying a new OEM hose for $$$, I got a cheap 5.9" standard hose from Amazon and made this adapter.

Simply thread your replacement 5.9" hose into it, and clip it into the Danby hose attachment piece that slides onto the back of the AC unit.

I used ASA due to the warm air passing through the hose. YMMV but I'd recommend a high heat filament.