I bought the Aero. It is a nice bit of kit but this one is a bit small for me. The options that came with it are worthwhile on their own and can be utilised on my 2GX.
The odds are slim on finding one that is a 'slip in' for me.
So with that in mind, I am considering the option to widen the frame and modify the footplate to accommodate my frame.
I have access to a good welder. A few parts would need to be sourced; wider axle with moderate camber 2 deg ?(this one has 6 deg ), and maybe replacement seat upholstery.