Amazon.com: NETGEAR Orbi Built-in-Modem Whole Home Mesh WiFi System with all-in-one cable modem and WiFi router and single satellite extender with speeds up to 2.2 Gbps over 4,000 sq. feet, AC2200 (CBK40) :
Nighthawk DOCSIS 3.1 3.3Gbps Two-in-one Cable Modem + WiFi Router for Sale in Bellevue, WA - OfferUp
ARRIS SURFboard 16x4 Cable Modem / AC1600 Dual-Band WiFi Router. Approved for XFINITY Comcast, Cox, Charter and most other Cable Internet providers for plans up to 300 Mbps. - Walmart.com
How To Connect 2 Routers On 1 Home Network - YouTube