This one looks ok but it makes the shoulder buttons hard to reach.
http://www.amazon.com/CYBER-grip-rubber-coating-3DS-LL/dp/B008ZXBYJU
This would be great, but I can only find it for standard 3DS.
http://www.amazon.com/HORI-Nintendo-3DS-Mario-Racing-Wheel/dp/B0061YFZDQ
http://www.amazon.com/CYBER-grip-rubber-coating-3DS-LL/dp/B008ZXBYJU
This would be great, but I can only find it for standard 3DS.
http://www.amazon.com/HORI-Nintendo-3DS-Mario-Racing-Wheel/dp/B0061YFZDQ