West Coast Customs built some too http://www.westcoastcustoms.com/showroom/corporate-builds-2/?album=2&gallery=55
Word. What makes it even cooler is the picture gallery. The second kart there (the yellow one) is AWD (All Wheel Drive. Meaning all 4 wheels are driven by the engine for yoou non mechanically minded...). That gives better stability control on unstable tracks.