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G3 do wide skins that might suit...
http://www.genuineguidegear.com/gear/skins/alpinist-high-traction-climbing-skins
Due to the nature of the tip connectors on G3 skins you should be able to get them over the tip. A G3 XLong 140 would fit the C&Ds, remember when the width of the ski is getting considerably wider than 140, it's in the rockered section and thus you wouldn't be using it to skin on.