Please let us know the year, model, engine size of your car and type of carb currently fitted. Would be useful to know why you feel the need to fit a new carb.
Bi Metal spring for solex auto choke 28 IBT that was fitted to my fathers '68 plein air http://www.renault4.co.uk/forum/showthread.php?t=189 is rusted up. want to replace with a manual choke but cant find one.
A friend of mine has a brand new Zenith 28IF. He bought it and then realized it was for an 845cc engine, while he has a GTL. If you are interested, I can ask him if it's still for sale.