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It depends on what winds up fixing it. Replacing the reset valve will cost about $155 plus labor (only .5 hour labor). If its the hub, it will run about $380 for the parts (including the timing belt, timing belt idler and tensioner) plus about 5.5 hours labor.
Click here for the camshaft reset valve. This is from FCPGroton.com. I recommend them often and have personally used them
A lot of people like IPDUsa.com as well, but I have not personally dealt with them and I can't find a listing for any of these parts on there.
I don't see an aftermarket listing for the CVVT hub or the gasket, those are likely dealer only items.