need a magnum transom stern light for my Magnum 25. anyone have one?

i thought they were a perko product ?

Most of the original deck hardware on the 25 was 'Marinium'
.. a strange material no longer available I believe .

What sort of 'resto' or 'cleanup' are you actually looking to do now ? ?

Personally , I wouldn't sweat it ..enough has already been changed out on the boat before you got it to start worrying now about 'original hardware'

Perko makes decent quality round and rectangular replacements. And one if them will suit your needs just fine.