A rough costing

4m* / 80 conductor FEP over silver/copper IDE cable at $14/foot:  $182

International shipping: $9.75

UKP total £110

8 plugs and heatshrink approx £30

Material costs for 2m pair approx £165 including VAT

*based on 40 parallel conductors per side

I think it would be the sensible thing to do if I were (and I might). Hastening to add I'm sure the same or similar mark-ups apply to awful lot of hi-fi wires.