I might have one of these as I've a pair at work, one of which is dead - I just can't remember which off the top of my head! They're also pretty well used.. You can have it for free if I discover it
Sorry for the delay, funnily enough I was just thinking about this!
I've just dug the pedals out of my spares crate at work and they're M535's which are pretty much the same pedal as far as I can see.The good news is that the left pedal seems to be the better one but they are very battered.
I'll PM a pic over in a moment - you can still have them for postage if you're interested