Have you considered whipping an ABS controller off a scrapper?
It won't be the ECU. Had you not already said you'd eliminated everything else, I'd have said "sensor".
( Kroney, Mon 4 Apr 2011, 12:54, 1 reply)

sensor was first thought
but they have been changed, the rotor things that work with the sensors have also been examined.

I have considered it, particularly seeing as it is probably the same unit on a Leon, a Golf, a Bora etc.

I have zero experience with getting parts from places like that though. How does one go about it?
( Vipros. clever got me this far, then tricky got me in, Mon 4 Apr 2011, 12:58, closed)

These days you go into the shed, tell the guy what you want
and they either go and get it for you or bring a suitable vehicle over for you to get the part off. The days of wandering around piles of old cars are, sadly, long gone.
( Kroney, Mon 4 Apr 2011, 12:59, closed)

I'll have to find out where one is
then find out what the part looks like and how to remove it.
( Vipros. clever got me this far, then tricky got me in, Mon 4 Apr 2011, 13:03, closed)

It's worth a go, the actual part will probably only cost you £20 at most from a scrappy.
You might also try online parts centres like GSF.
( Kroney, Mon 4 Apr 2011, 13:09, closed)

my mechanic mate works for GSF
which is convenient
( Vipros. clever got me this far, then tricky got me in, Mon 4 Apr 2011, 13:20, closed)