Don't know how long a cable you're looking for. But something like this should work:
http://m.ebay.com/itm/1-ft-10-Pin-2-...%257Ciid%253A1
Search: 2x5 extension cable 2.54
The header is a 2x5pin 0.1" pitch (2.54mm pitch) it needs male on one end, female on the other.
You could buy just the male &female ends and make the cable yourself. Or if you have the tools on hand to crimp PWM wires, you can make an extension cable yourself. Its the same pitch and pin size. Or take pre crimped pwm cables, pull the leads out of their 3x1 jacket, insulate the ends and plug them in on each side. This is a little less desirable route if you don't have the right size shrouds since the cables will have a tendency to get pulled out, and you can plug them in wrong if you're not paying attention.
If you make your own cable, you don't need conductors for all 10 pins. Check the data sheet, but you should only need ground, the supply voltages, CS0, clk, mosi, miso. The pinout for the Rio is right next to the header your sensor is plugged into.
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