Traditional Skin VOs - Why not an option to toggle between voices?

Regarding champions like Trundle, Karma, et cetera...

Would it be at all possible to make a toggle for which VO an individual player hears when they select such champions? That way people can hear whatever VO they prefer for a given character, without having to limit which skins they can choose from?

This doesn't seem like it should be too terribly hard to do. The game assets already exist, and are already implemented in the client. And there's already a technical precedent with the DJ Sona skin allowing players to change what music they hear in game, on the fly.

Is this feasible? Because I'd really love to use my Traditional Trundle skin with the modern VO that I prefer, and I'd love to use a Karma skin other than her Traditional outfit, yet still be able to use her legacy VO instead. And I'm certain vice versa for other folks too.