As Paul form RF said in the thread, while the standard design is for the Audi, you can pay them to modify the chassis to accept whatever you want. So, the Audi isn't the only offering, it is the standard one.
I have heard many times that the RF suspension design left a bit to be desired. RF2 spent considerable time redesigning it in such a way as to make it possible to retrofit the new design. The reason is they had to design new alloy ones to replace the original cast ones. They also redesigned the steering set up, producing new components for both systems. This total "start from a clean sheet" design has led to a much improved set up.
Congrats on getting the car sold - I love the cross ram EFI set up and wish I had the funds to purchase it. Perhaps when the economy turns around some, I can start planning again.
I also chuckle every time I see that guy try to sell your old Lola replica for a nice profit. That would have been another nice project ...