Amazon.com: Camco PowerGrip Camper/RV Generator Adapter | Features a 4-Prong L14-30 Male End and a Standard 50-Amp Female End | Rated for 125/250 Volts & 7500 Watts (55422) : Tools & Home Improvement
Camco 30M/30F AMP 12 in. 4-Prong Generator Adapter at Tractor Supply Co.
Camco 55382 RV Generator Power Cord Adapter - 30F/4 Prong
Power Grip™ 30 Amp 4-Prong Generator Adapter #55338
CAMCO Yellow L14-30P to TT-30C DogBone Adapter | UL Listed | 125V 3750W | Outdoor Use | 12-Inch Long in the Power Adapters department at Lowes.com
Camco 55422 50a 12 Inch 4 Prong Adapter: RV Power Adapters (014717554220-2)
Amazon.com: Camco Power Grip Camper/RV Generator Adapter | Features a Heavy-Duty 30 Amp Locking Male and Female Connection | Rated for 125 Volts / 3750 Watts (55333) : Automotive