I take it that Meastro in my Lude profile put the shitters up you? It honestly did to me as well but thinking about it, it was a Meastro and not a Lude and probably not being driven to well either. You'd have to be doing something pretty stupid to flip a Lude IMO, but that doesnt stop someone else from hitting you.
I think that any cage would have to be custom built in the car which would make a group buy quite hard. I am going to get a cage though as the stickier tyres you use the more chance there is of flipping it

and I would like to use my full slicks

.