where can i find and compare prices on roofing and insulation materials?

I've found lots of building forums and general "building advice" columns that go over very high-level pros/cons to choosing roofing material and insulation options, but I want a site where I can see hard costs of ordering each of the materials so I don't have to call up a ton of contractors or dealers. Does such a comparison site exist? Everyone offers quotes, but that takes too much time to apply for quotes to every dealer. I'm specifically interested in knowing what green options I can afford (cotton batting vs. formaldehyde-free fiberglass, etc.). BTW, Home Depot and Lowes web sites don't have any roofing products (like asphalt shingles) listed and generally don't carry many green options (like cotton insulative batting).

Public Comments

1. Lowes.com, Homedepot.com, think it through!
2. You could call ABC supply or Norandex Reynolds, they are the biggest distributors I know of. They may have some resources for you.
3. Here's a pretty good site on the cost comparison of various kinds of insulation: http://www.spray-insulation.co.uk/Insulation_material_comparison.htm It's in euro's but you can convert or get the idea. Also, you have to click on the graphs to get a more clearer image.