[ALUG] how to buy a SATA power adapter cheaply?

I need a SATA power adapter, one of those things to connect a standard (Molex) 4-pin power connector to a SATA drive. They're about a quid each or less (best I've found is 68 pence for a two-way one) but carriage charges make that irrelevant. Does anyone have any suggestions as to where I could get one at a reasonable price in the Ipswich area and/or a company that sells them that will stick one in a jiffy bag and send by Royal Mail for a pound or so? -- Chris Green (chris@halon.org.uk)