I don't think new would be very cheap but the s/h market is full of them. I got quite a few from U-pull-it off older Fords and such for 20 bucks or so. Some were gunky some were clean, but they were all in good nick and cleaned up a treat. A carby place I found would bring them back to new. Butterfly spindles can wear, it's antimony after all. I think at some point they put bronze bushings in them that can be replaced. I even put teflon sealed ball bearings in a few, worked a treat.