Try the robin hood one here possibly by Ellis Stafford
http://www.petitrc.com/setup/xfactor...factoryX6.html
Hope this helps..
You might want to change tyres to green schumacher minispikes or green ballistic spikes in the wet/damp. I dont think it will be grippy enough for stagger ribs though. If your lacking rear traction, try going down to 25 weight shock oil in the rear shocks.