CX600M is £53.54: http://www.amazon.co.uk/Corsair-Builder-Series-Modular-Certified/dp/B00ALYOTTI/ref=sr_1_1?s=computers&ie=UTF8&qid=1390423038&sr=1-1&keywords=CX600M
I can buy this extension cable and remove its connector, thus not damaging the PSU cable, right: http://www.ebay.co.uk/itm/StarTech-8-inch-ATX12V-4-pin-P4-CPU-Power-Extension-/290992276563?pt=UK_Computing_CablesConnectors_RL&hash=item43c07dc453
Yes, that should work. Thats how they setup before they added the PCIE connector.
https://bitcointalksearch.org/topic/setup-troubleshoot-bitmain-antminer-s1-180ghs-miner-344970