any stain you can get from your local hardware store would work. I've even seen people use Old English for the stain. It looked pretty good. Then finish it with tru-oil or something similiar. I think the hardest thing you will have is getting the newly stained part to match the other wood. You may end up wanting to refinish the whole thing.
Or if you really want to get fancy, you can put duracoat on it! I've never worked with it, but watched a few videos on youtube and read up on it. Sounds pretty good.