Another professional 4WD kit is coming from new company. Team ART who makes pro race conversion kits&parts of Academy has shown the first image shot of their first 4WD Electric Buggy conversion kit X1.
According to Team ART, the kit will be released late summer or early fall, but the exact release date hasn't been mentioned yet by team ART representative.
The first prototype kit was successfully tested and working for final adjust design.
Source:
http://teamartracing.com/