Well I don't know about free runs as such, as we don't do this in our house as it isn't suitable, even in the bathroom for one reason or another.
How about you let her free run on the bed with you keeping an eye on her? I am sure she would enjoy the freedom, and you would be able to ensure that your home stays in one piece?
Or you could make a playbox out of a plastic tub (like they use for bin cages) just so she gets a change of scenery and has some different items to play with?
I'm sure she isn't unhappy with not having free runs as such, as long as she has opportunities for exercise (in her cage or out) and lots of care and attention, I'm sure she considers herself one lucky girl!