first you can't say some weapons are unable to transmit chidori cuz when they taught Naruto how to control wind element, I think they said that he could use it trough weapons such as kunais making a legendary weapon more than qualified to be able to transmit chidori

second like I said Oro could have just gave Sasuke the Kusanagi sword making it definitely his and Kusanagi's importance in the Japain's history and legends is huge so I no writer would make two on one manga.