z650 Carbs - replacing

I have a 76 z650 and the carbs are well worn. I wouldnt mind swapping them for a better set.
The carbs on the bike are actually from a z900 as far as i can tell. The linkages are worn, they flood up but they work ok if you are ginger with them.
What i would like to know is whether anyone has any z650, 750, 900 or z1 carbs for sale? Or know of any others that may fit?
Maybe i should just bite the bullet and buy a new set of flatsides...
like these for $US 663
http://kzzone.com/carbs.html
The carbs on the bike are actually from a z900 as far as i can tell. The linkages are worn, they flood up but they work ok if you are ginger with them.
What i would like to know is whether anyone has any z650, 750, 900 or z1 carbs for sale? Or know of any others that may fit?
Maybe i should just bite the bullet and buy a new set of flatsides...
like these for $US 663
http://kzzone.com/carbs.html