I have a box full of this type of thing,cables I used in my earlier builds I have very little in my builds these days that use a molex connection but I can remember being in a similar situation as patricktbuckley, so my first port of call whenever I needed some sort of conversion cable is Ebay.
Thanks to everybody for your suggestions. To my embarassment, the female molex on the Arcasa also has a male connector - what fooled me was that at the male end the cables seemed to be entering at the end. When I turned it over (having read a review on Amazon about the same 'problem'), the cables go into the bottom of the molex but very near the end. Thus, checking the end properly, I discovered a male connector. So, sorry for being such a plonker, and thanks to you all for your kindness. At least, I have been given two very good websites (1 on eBay + deLock)for future reference.
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