If you can find a commercial Nebbiolo in your area that woud be best. Barolo is also exceptable but typically much more expensive! If only needing about 1 bottle and full wine will do as it wont change the profile, 2-3 bottles and you will start to change it slightly.
You don't say where your located but if you have a Trader Joe's anywhere close they have quite a few options in the $5-$10 range.
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