Any one if fine. Get a cheap one. If you are using a circuit board it might require surface mount but you would know this already.
Any cheap
through hole resistor is fine. 13k to 17k should work well. It doesn't need to be high precision or metal film or anything like that. Small is nice because they take up less space in your
mod. Some folks just cannibalize their resistors out of old pc power supplies or other electronics but they aren't color blind like I am. Just
buy cheap ones.