7560 interpose cable

Just received my new 7560 i7 today with the 256 ssd, I have researched on here to fit another ssd. I believe the caddy is present but not the cable. I saw one guy quoted over 30 odd quid and then got it for under 2 when stating the USA price. I tried the same tack but got nowhere, rep says it's just shy of 40 quid and another 100 plus if someone came to fit it. This is the first Dell I have bought after usually going with hp. I must say I'm taken aback by the price and expected it to be in the machine in the first place. I have looked to source on flea bay with no luck. Has anyone got anywhere with this?  I'm beginning to regret my purchase. Jim