Where can I buy a new speedometer cable for 3rd generation?

[Monstruo'71]

Hi Guys, I am restoring my Charger and don't have the old speedometer cable, somebody knows how length is it? I saw in some places the length is 61", y others places 65" and 80" my Charger is 1971 with manual trans,

thanks in advance.

[CDN72SE]

Megaparts has them: http://www.megapartsusa.com/proddetail.asp?prod=205%2DSC360