I have a pair of 140 Fox Float 32 Forks that leak oil from the upper seals, which have recently been replaced.

I know a little bit of oil is meant to be released to keep the stantions lubricated, but I have oil running down the lowers in sufficient quantity to contaminate the brake pads, which is a bit of a pain to say the least.

Anything I can do to stop it?

Sorry for obvious questions but have you fitted the correct amount of oil, and are your stantions worn?

iirc there is only about 30ml of oil in the air side and about 160 in the damper side?

check for play in your bushes