The coupler manufacturer, Kimbrough Products, has a toll free #1-800-377-1597 for direct purchase of the RDS couplers. Phone line is accessible 8 AM to 3 PM, PST, Mon-Fri. A package, KP item #500, contains 2 pair of all coupler parts. Minimum order is $20 (4 packages). $5 S & H, plus sales tax for CA residents. Visa and Master card accepted. See RDS website below for full details. Harley Michaelis, [EMAIL PROTECTED] 26 S. Roosevelt, Walla Walla, WA. 99362. (509)529-2562 RDS website: http://www.bmi.net/propt/rds/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]