Plugs for Intake Manifold holes????

Does anyone know where to get threaded plugs to plug up extra holes in the intake manifold that aren't being used?
Also, does anyone know where to get cheap parts?

Cool, thanks! Oh, and good point. I should have rephrased my question. Is there a good place to get inexpensive quality parts?

Or, a hardware store.

Lem Evans wrote:Or, a hardware store.

x2 they are regular pipe tread hardware store should be cheaper

Nice, I didn't even think about the hardware store!

As far as parts are concerned, I'm just looking for general places to get parts as I build this project. I'm new to Fords and am wondering where all of you get your parts.