I have used both wrights and Nu Line with good results as far as service and parts as long as I called Nu Line between 10am and 2pm I never had a problem,they do however have a message on their website that says "We apologize if you are having trouble getting through on the phones. We are experiencing a larger than normal call volume. Thanks for your patience"
You may be better off ordering the part off their website. http://www.nulineguns.com/