Does that machine have the hand wheels on it? If so, I would be all over it. I understand the issues with the post and communications. What one of my customer's did was have an intermediate computer that translated the communications for a antique Fanuc controller. That way they could develop the parts on a modern computer. AutoDesk is pretty responsive in developing new posts for their software, they did a special for me for their Fusion 360/HSM.

Another option for controller software is mine. I give it away for free.