you should be able to make one pretty easy for about $15.00 ...
-aligator clips from RS,
-AAA 2S holder (x2) from RS,
-Styrene from LHS,
-industrial strength double sided tape from Lowes,
-Zip ties Lowes,
-Zip tie mounting bases from Lowes,
-Deans Plugs from ebay,
-18g Superflex wire from atomicmods, (or cheaper silcone wire)
-Spare Stage 1 motor,
Mounting Bases, Just FYI:
http://electrical.hardwarestore.com/...ign=googlebase