are you referring to an AIR HOSE, attached to the front air connector, for use of keeping tire PSI levels, etc.?
For several years I simply wound my 50' orange air hose around the front chassis rail that ends within the generator area - never a problem. You could 'try' to find a small reel that you could also mount there, but it seems a little overkill for the few times you use the air hose, and the mounting would take some work.
'14 Thor Palazzo 33.3 compact diesel 100k+miles since '14... US, Alaska, Canada...
AND a '14 Gulfstream Amerlite
AND a '07 ForestRIver Rockwood