Maybe I am missing something here, but it is my impression that involving a Class 3 dealer won't solve any problems for the OP, especially time and cost.
My understanding is that for an NFA item to go to a dealer's books from an Individual or Trust, a Form 4 must be submitted and tax paid...
Please remember that the "overturn the ban" would only apply to this particular Court of Appeal's jurisdiction (not nationwide until SCOTUS may act).
So... if you want to play with your bump stock that you found after thinking that you lost it in a she-shed fire, please only do it in Texas...