Thanks, Mark!
My MM recently went through a rebuild under the brilliant care of Jareth Lackey (Synthpro) - I believe that the MM PS was slightly modified, but is still original -
What I'm thinking about is mounting a liquid cooling system onto the back of the MM itself - perhaps a liquid-carrying copper-pipe 'radiator' of sorts mounted to the heat sink; hopefully requiring no internal modification(s) to the MM. This is assuming that the heat sink is already ideally placed to dissipate heat; so my idea essentially would be to assist in cooling what's already there.
The platform idea would be similar, just cooling a larger surface area (the bottom of the MM)