right well i dont know where ur from uk or us
im from uk so i can tell u where to get that from easily depending on what size you need .
UK = this is an all in one kit from ebuyer http://www.ebuyer.com/UK/product/57791
but i have found going through a scart adaptor lowers the quality of text and even makes it hard to read so best if ur tv has a s video socket like the one on the back of your graphics card
US = s video lead http://www.newegg.com/Product/Produc...82E16812105817
audio cable = http://www.newegg.com/Product/Produc...82E16812337011
adaptor = http://cavuk.com/product.php?productid=1180
again hopefull your t.v has an s video socket on it so u dnt need the adaptor as u will get better quality pictures and text
the audio lead the small 'headphone' looking end goes into the back of your pc where ur regular speaker would go and the red and white would go into the adaptor or your tv.
and the s video cable goes into your graphics card and then either into slot on your tv or into adaptor.
very simple i always have my pc hooked upto my t.v as an extended desktop