Still available new from CC. Part number 951-3029.
If the "local" store you are referring to is a Cub Cadet dealer, tell the idiot behind the counter to learn how to look up parts.
Here is a link if you want to order online. No, you won't find a new one any cheaper:
http://www.cubcadetpartsnmore.com/m5...-12-kohle.html