Current awning is about 9 ft. I think 12 ft is about as long as you can go, if you install one with support rods and brackets like the original.
My '07 View H (same chassis as yours) also does not have an awning, I think the original owner destroyed it and the dealer who brokered it for the estate removed it.
Charles
'03 Ram 2500 CTD, 5.9HO six speed, PacBrake Exh Brake, std cab, long bed, Leer top and 2008 Bigfoot 25B21RB.. previously (both gone) 2008 Thor/Dutchman Freedom Spirit 180 & 2007 Winnebago View 23H Motorhome.