http://community.flexifoil.com/showthread.php?t=96169
Have a look at the above post for info on the RS Buggy, the RS is usually for sale via Ebay and are shipped from Germany (3 days to your door) but there doesn't seem to be any at the moment if you like get in touch with MAVERICK440 on these forums and he will put you in touch with Ralph (the seller) as you can buy direct and also have it built to your own spec i.e wide axle, swan neck, wide wheels and a choice of seat colour (the seat has just been improved and is very comfy).
you can also contact Ralph direct at gura01@web.de