Camera cable

I seem to have mislaid the USB cable for my camera. It may be in the boxes of stuff my father is keeping for me for a few weeks (this is very likely) but it will be three weeks at least before I find out. It seems sensible to have a spare anyway, so I intend to buy another. I'm just not sure where.

I bought the camera (a Panasonic Lumix DMC-LS2) from John Lewis, and they might do it; but my websearching suggests it's possibly not stocked any more and I'm uncertain where else I could look. Any tips, anyone?