Yep, that's the one I have the conversion kit for, you get all the parts that are different and a new bag of screws.
http://www.tcmodels.net/index.php?op...=493&Itemid=71
I would agree if you are only changing the parts to a Short Course the price of the full kit has no reason to be more than $10 more than the Stadium truck, which itself is normally $10 more than the buggy (at the most and the same price often)
I would have converted the madrat into a (too short, too narrow) short course but I decided I like it as a buggy more. I also decided if I was going to have a truck then it better be a Stadium Truck and keep it real

so I got one of those instead.
There's suppose to be a longer/wider one in the works at some stage. Don't know if Ansmann will swap to the newer one when it's finished but TQ racing and Team C usa are keen for it