Octavia 1.6 fsi 2005 timing chain

Hello, does anyone know an 'affordable' Skoda dealer when it comes to buy Original Skoda parts ? I'm looking for the timing chain kit, as I have a rattle on the engine when the engine start for about 2 sec, then it dissapears. Someone told he it's the tensioner that's becoming faulty. The car is an Octavia 1.6 FSI petrol, 2005, engine code BLF, and the oil was changed 4 months ago (so it's not the oil).

I saw on ebay the aftermarket kit for £150, but I mention I 'burned' myself with aftermarket parts (last year I bought an aftermarket EGR which didn't seal at all - it has 1mm space all around the channel - rubish chinese), so I think I better buy the original part (as the labour is quite expensive on this replacement and can't aford 2 replacements).