AC WORKS 1.5ft NEMA 14-30P to NEMA TT-30R 30-Amp 4-wire To 3-wire Grounding Single To Single Yellow Basic Flexible Adapter in the Adapters & Splitters department at Lowes.com
Journeyman-Pro Dryer Adapter Cord 3 to 4 Prong Plug | NEMA 10-30P Male to 14 -30R Female | 30A, 250V, 1.5FT, Old Style Wall Outlet (3 Prong Male to 4 Prong Female w/Ground) - Walmart.com
Parkworld 886603A NEMA 14-30 Splitter, Dryer 14-30P Male Plug to (2) 14-30R Female Receptacle, Dryer 4-Prong 30 AMP 14-30 Y Adapter Cord 12 ft. - Newegg.com
NEMA 14-30 dryer extension cord, 4 ft.
parkworld 50 ft. 10/4 STW 30 Amp 4-prong Dryer Heavy-Duty NEMA 14-30 Extension Cord 886092 - The Home Depot
20 ft. 10/4 SOOW 30 Amp 4-Prong Dryer Heavy-Duty NEMA 14-30 Extension Cord | UltimateAdapterDepot