http://www.amainhobbies.com/product_...oducts_id/6721
These are for the Lightning GT10 to make the stock GT10 14mm hex wheel fit it. Its a stock item and a direct fit for the Lightning Staduim 10. Not sure about a 17mm adapter though. Just thought Id throw it out incase it helps.
EDIT: With these hexes stock Maxx 14mm wheels work perfectly. I used them all the time on my nitro GT10.