Power Gear 25-ft Round Rj11 Phone Cable in the Phone Cable department at Lowes.com
Phone Handset Spiral Coiled RJ11 4P4C Plug Telephone Extension Cable Line Black - Walmart.com
6.5ft Male Rj11 To Rj11 Telephone Handset Extension Coil Cable Cord Line Wire Lead Telephone Extension Cord Line Cable Black - Cables, Adapters & Sockets - AliExpress