I wish I was there to do it for you. However, that isn't the case. As far as places near you, I have no idea where any are. What to do, is get estimates and I can let you know if they are high. It should cost around 100 to have it done. I have to say, needing the radiator flushed usually doesn't cause the need to add coolant. Are you sure there is no leak? As far as the radiator, is the engine running hot?