If it's just the outside of the needle you may be able to just straighten it, been there and done that. When I did mess up an engines complete assembly I just went to my LHS, at that time I think it was a hobby town and they just ordered the complete assembly for me. They had just the needle valve in stock too. They had a complete break down of the engine with all the numbers on there computer. Are you sure it wasn't bent before it was shipped to you??