No, because the mounts are different. you can fit a FatBoy front fender to a Touring bike with an adapter, but the mounts will have to be changed of a RK fender to fit a Softail. If you want that style of fender on your FB, get a Heritage Classic fender.
Doubt it bro, just like you can use an nacelle for a touring bike on a softail i think it goes the same for the fenders, forks on a touring bike are farther apart then on a softail