Long coaxial / S-PDIF cable and Supra cables

Hi there,

I'm in need of a 12-15 meters long coaxial / S-PDIF from my Pioneer DJ-mixer output to an analogue Allen & Heath mixer just before the monitors.Is that a long wiring with this type of cables? I can't afford an really expensive cable as a quality 75ohm cable comes usually with length ranges of just some meters.I have found only one quality product on these ranges and it is from the swedish manufacturer Supra. This model is Trico: http://www.jenving.se/?p=d_interc

The 15 meters long Trico costs 125€ in Finland without VAT.

Buying from a swedish manufacturer would be great as I can buy it from here, their neighboring country Finland. Yet I haven't found any review of their more quality cables anywhere. There was their cheapest interface cable type AnCo reviewed here though but that isn't so helpful.

I haven't found information on such lengths with S-PDIF as it comes to more quality cables, would anyone have information to contribute here?