I ordered exactly the same (MS Hi-Def kit and gamecube component lead) from Lik-Sang last thursday night.
They arrived yesterday morning. I was careful to use the first shipping option (global priority ??) as I had heard that if you use the big carriers, they automatically charge you customs regardless, although I don't know if this is true.
Anyway, it was a medium sized box, with a $64 merchandise customs sticker on it, but I didn't have to pay any charges. It had to come from the HK warehouse, as they don't do the MS Hi-Def in Europe, but it seems from the packaging that it was first shipped from HK to the European depot, and then on from there to myself, so whether that made a difference to how the customs works, I'm not sure.
Anyway, I obviously can't guarantee the result, but I was certainly lucky enough to not get charged by Royal Mail.
HTH,
Michael.