I think I have the speedo parts you're after. Give me a day to go rummaging in the shed and I'll get back to you! I took mine off when I fitted a later engine without the magnet spindle, and fitted an Trail Tech Endurance 2 speedo, which I'm very happy with, but is not your cheapest option!
Back soon,
Simon.
These are the bits I've got: Speedo sender and housing plus housing cover that replaces the big silver plastic mudtrap, and magnet. I haven't found the nut that holds the magnet on the shaft, but Brian sells them for a couple of quid.
You have a PM....
Cheers, Simon.
PS I also have a digital speedo head unit for sale, if anyone's reading this!
now got origional silencer & pipe so not on the lookout anymore just to sort out my speedo but i think the head is no good cannot do anything with the buttons blue red if broken anyone got links to a cheaper option that is any good many thanks