Everything needed for the starter button conversion is already in the chassis loom apart from the button switch itself and short associated loom with plug to match that on loom behind dash. The larger Morgan spares dealers stock these. You will find a similar shorting plug which the button one will replace, removing the key start option. As you may have noticed the start system is designed for start/stop so you only need to touch button once to initiate auto sequence.
Not a fan of spotlights and have dedicated LED headlamps on my Roadster anyway. Again all the loom wiring is already present though. Look for redundant bullet connectors under each wing fed by blue/yellow cables. Again there is a redundant fog/spot light connector behind dash to match a similar one touch select button which should be available from spares dealer.