MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Sinclair ZX Spectrum Next 2A Game Board - US Plug with Extension and ON/Off Switch - Amazon.com
QL Power Converter - with Universal Input* from Charlie Ingley on Tindie
Sinclair QL PSU Modern Black EU - Replacement Sinclair QL Power Supply, EU Plug
Sinclair QL: Teardown time - YouTube
Spares And Repairs | Dilwyn Jones Sinclair QL Blog
sinclair ql computer with floppy drive+memory card and manuals Super nice shape | eBay
Sinclair QL PSU OLED Digital Gray UK - Replacement Sinclair QL Power Supply, UK Plug