Sequential circuits samplers

I have both a p2k & a 2k2, & they both run hot & hum noticeably. this
is especially the case because I'm in the UK & the mains transformers
in the instruments are designed for 110V or 220V operation; here
they're getting closer to 240V.
the transformers are old-school iron-core jobs, not toroidals,
although if the noise is a nuisance, it would be easy enough to swap
them out. I did this on someone else's machine ages ago to quieten it
down for studio use. 
my biggest worry was always the extra heat disspiation from the
slightly harder-worked series regulators in the low-voltage part of
the power supply, though I only had to replace one ever, & that was
many years ago. other folks (quite recently) have had fairly standard
linear power supply problems, like leaky electrolytics & bridge
rectifier failures leading to shorts & blown fuses, but they're
reasonably simple faults. 

the rest of the machine (touch wood) seems pretty reliable, with only
the disc drive being a problem from time to time. I replaced both of
mine with TDK types a long time ago, & had to "bulk them out" with, of
all things, compact cassette cases to fill up the gaps in the
metalwork left by the slimmer drives. 

my 2000, though, has a dead keyboard controller IC which I can't
replace, so I am looking for a 2000 that's beyond repair in some other
way to scavenge parts from. I'm sort of hoping that one won't turn up,
because I'd rather folks kept their prophets working!

duncan.