Eaton 8-in Generator Interlock Kit in the Breaker Box Parts department at Lowes.com
CUTLER HAMMER 60 Amp Range Fuse Panel Pullout Fuse Holder - £33.79 | PicClick UK
Cutler-Hammer ECN5522CAF Freedom Circuit Breaker Disconnect Combination Standard Width Pump Panel, 440/460 VAC V Coil, Hand/Off/Auto Action, NEMA 2/3R Enclosure | State Electric