After finding that adaptors are even scarcer than some of the machines I'm selling off, I've managed to source and offer these 9V, 1A UK-Pin (I can source Euro too, if required) power supplies/adaptors, suitable for use with ALL of the following:-
SEGA MEGADRIVE / GENESIS
SEGA MASTER SYSTEM
SEGA MEGA CD 1
* NOTE:- Photo's show these adaptors powering SIX different consoles, but they will almost certainly power additional consoles, and they also have an in-line adaptor giving 2 size options, hence Nintendo AND Sega compatible sizes. *
I'll check suitability for use with other machines (ORIC, Spectrum, classic handheld (Astro Wars, etc), etc), and update the listing if I personally find them compatible... :)
PLEASE NOTE - I also have alternative adaptors, which will happily power up old Atari consoles, etc, and anything voltage / connector-compatible - going to check into/confirm regarding ZX80 / ZX81 machines too!