Parkworld RV Shore Power Extension Cord, NEMA L5-30 Twist Lock 30A Extension Cord, Female with Seal Collar, Yellow (75FT): Amazon.co.uk: Electronics & Photo
AC WORKS 50ft L5-30 Extension Cord at Lowes.com
Power Extension Cord, NEMA L5-30p to NEMA L5-30r- Heavy Duty Locking Connectors - China Y Splitter AC Power Cord, IEC 320 C14 Male Plug to 2xc13 Female Splitter | Made-in-China.com
LifeSupplyUSA 50 ft. 3 Prong 10/3 30 Amp Generator Extension Cord L5-30P / L5-30R 10AWG3 125V STW VELCRO ETL APPROVED ER549 - The Home Depot
Conntek NEMA L5-30 30A 125V Generator Extension Cord