IIRC Amiga 1200 PSUs are not so bad, it's the C64 and oldest Amiga 500 PSUs which stink. A1200 does not have RTC in standard configuration. (Amiga 4000 and 3000 have.)
A standard ATX (or AT) power supply can be used with an Amiga 1200, so that's an easy route if you have one. Cut off the cables (Amiga PSU donates connector), some electrical tape, and a paper clip to jumpstart the ATX PSU, and Bob's your uncle.
A standard ATX (or AT) power supply can be used with an Amiga 1200, so that's an easy route if you have one. Cut off the cables (Amiga PSU donates connector), some electrical tape, and a paper clip to jumpstart the ATX PSU, and Bob's your uncle.