I would take a piece of the old cover if you can to your local hardware/paint store and see if you can match something up....make sure you tell them what type of material it is that you plan on painting....there is a procedure for plastic and different one for aluminum etc...
Glen & Robyn (A.K.A. Puff & Crickit) Full Timers..
2006 F350 6.0 with 3.73 gears, 4X4, Extra-Cab Long Box, Oil/Tranny/P.S. Coolers. Coolant filter. SCT Livewire.
2011 Cedar Creek 36RE, Auto levelers + too much to list..!