Best deal on parts?

[cruiserpop]

93 coleman yosemite.in the Mid Atlantic area. Looks like I'm in need of a new canvass/roof. Talking to coleman/rv workshops, I'll need to order both the parts directly or indirectly from Coleman. Anyone have ideas on the cheapest option? The roof alone, the shipping for a new roof to my local dealer was double the cost of the part!

many thanks