This mod adds unenchanted Dragon Priest Masks, craftable at forges. I used all 10 of the masks, and each one requires a different material, there is no enchantment on them, so you can enchant them with whatever you want to.
http://skyrimnexus.com/downloads/file.php?id=1234

Nice. Would love to see something like this for all the other unique artifacts.

Any way to make a light armor version of the final mask as well?

Im not quite sure to be honest, i figured out how to create the new item, and remove the enchantment, which was pretty easy, but without the CS, im at a loss of what record to change for the light-heavy armor.
If you have any request for the different artifacts unechanted version, just ask, id probably be willing to do it.

If you want help re-classing items, I suggest you ask sylkwyrm over at Nexus, as he's changed them to cloth/light/heavy armor masks.

I want some unenchanted Thalmor robes....... Forget DP masks.

This and non-enchanted Nightingale Armor. (Why is it, that all the best looking armor always has some of the worst enchants in the game?)

Idea for an alternate version of this mod:

Make the recipe for these masks require the enchanted version as one of the 'ingredients'. Maybe the mask and a daedra heart or something else hard to get. It'd be nice if the masks also required the dragon smithing perk (if it doesn't already?)

I say this because it seems more immersive to me to be able to take these to a forge and 'remove' their enchantments that way. Really, it'd be nice if all the unique artifacts had this kind of option at a forge (as I mentioned earlier).

Specific request: A recipe to smith an unenchanted Dawnstar that requires Dawnstar as part of the smithing recipe. Would also be nice if the unenchanted version's stats matched a Daedric Longsword.

Hmm, it appears someone already beat me too it, feel free to check out this link, where sylkwyrm already created unenchanted versions.
http://www.skyrimnexus.com/downloads/file.php?id=454