This is basically what I have Chunks:
http://www.cablestogo.com/product.asp?cat_id=2002&sku=13787It gives me a stereo F point near me that then runs into the soundcard at the back.
Having a headphones jack near me already, I need only one to do the mic.
That cable you pointed to isn't really what you need but it'd do the job if you found one somewhere.
It has two F heads when you only really need one.
Surely some Dublin people could point you to where in town they got their cables.
I picked mine up in quite a small TV/audio shop here in Clonmel so they aren't impossible to find but you might have to ask for one.
If you browsed enough places that flog audio gear and cables you will definitely spot one somewhere.