Need parts for Rain Soft Airmaster

We have the Rain Soft Airmaster Ultra 65052. We need to replace two bulbs and the Rain Soft distributor we purchased it from wants to charge us $250 to replace them. The system is only a little over a year old and they never told us this equipment had bulbs that needed to be replaced. My husband says he could replace the bulbs himself if we could find them but the distributor will not sell us the parts they will only let us have them if we pay the $250 to have them installed. Does anybody know where we can get these parts?