Has anyone done a rear anti roll bar on one of these?

Whiteline do one for the 9N

I find the handling quite good up to a point, then it heels over at 45 degrees (slight exageration) and understeers. With a rear anti roll bar I think the handling would be transformed

Your comments please

I am looking for one aswell.

I have seen a few pictures in the past but no luck findind them at present so I am now thinking about making my own strut brace for the rear.

Well that may tighten things up a little but will not overcome the lack of roll stiffnes