Not mid-motored, but should be easy enough to fix if you're of the mind. 
JConcepts – J82 Conversion kit
The J82 is the buggy of your dreams, combining the drivability of a 1/10th truck with the fascination of a buggy. The J82 is a terrific platform for drivers wanting to race on a bigger track with tough terrain. The J82 allows a brushless and lipo driver the opportunity to race with more confidence for an extended period of time.
The JConcepts J82 is a conversion kit for the Associated RC10T4 vehicle. With this conversion, a driver can now compete in two
classes on the same day using just one vehicle.
J82 conversion kit features:- Original JConcepts Illuzion - J82 body with J82 decal sheet
- 1/10th Scale Ball Cups (black)
- Groovy - 1/8th - 2wd front, green (fits 2.2" buggy front wheel)
- Double Dee's - green compound (fits 2.2" truck wheel)
- Mono - J82 front wheel (white) - 2pc
- Mono – J82 rear wheel (white) - 2pc
- Factory Blue Titanium Turnbuckle, 1.775"
http://www.jconcepts.net/store/index...ca7d6395f2b650