Suggestions for flexible / rugged data cable?

I am trying to source a replacement data cable for an application currently causing us problems.
The application requires a multicore cable carrying signals from a
trackball, volt free pushbuttons and a potentiometer into a control system. The current cable is a 'standard' PVC data cable, 20 core screened, approximately 9mm OD (I need to check if all 20 cores are required - I think a 14 core cable or less would be suitable).
The problem is that the controls are on the arm of a suspension mounted seat on a small boat operating in extreme conditions, so even with optimal routing there are locations where the cable will be frequently bent from 90 degrees to straight and back again, and a lot of potential points where chafing can occur.
I'm currently looking at Lapp Cables Olflex robotics range, but can anyone suggest alternatives that are:
Zero halogen Good minimum bend radius Very flexible with minimum risk of work hardening Good resistance to mechanical stress / chafing Small OD (I believe the current cable has 0.4mm cores, should be able to decrease to 0.22 mm cores)
Thanks
Chris
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Chris wrote:

Go and take your requirements to Raychem <http://www.raychem.com/ . They do all kinds of specialised cables.
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Paul E. Bennett ....................<email:// snipped-for-privacy@amleth.demon.co.uk>
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I have used the Olflex cables on a couple of crane installations and found them to be very good with a very tough sheath. If you can't find anything cheaper, personally I would recommend using them.
Cameron:-)
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Check into Turck 'Flexlife' cables. Using them in several 6-axis robotics applications with excellent results.
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Anthony

You can't 'idiot proof' anything....every time you try, they just make
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