I also dislike contrasting date wheels, the current Rolex Datejust has it on some models and it detracts from the watch in my view.
If it's a straightforward Sellita movement, for which parts are readily available, I see no reason why it can`t be swapped. There's a fair amount of work involved but it's a straightforward job. Not volunteering myself, but I`m sure someone can do this.
Paul