Yep that's exactly what you need, the same seller I got mine from too.

Just a quick word of advice - when taking the old one off be prepared for the arm to be pretty damn tight! It took me a while to remove it but it did come off eventually with some gentle whiggling and a bit of prising with a screwdriver. Just be careful not to pull too hard or you might damage something.
 
alternatively i like the golf mk5 one ? .....its wt ill be changing too :D
If you like the Mk5 Golf wiper the Touran is a better choice as it looks the same but is a longer blade. The only problem is the nut/washer cover is about 5mm taller than the standard Leon part and requires a bit of trimming... Looks good once done though.
 
Estate wiper arm, £10.57 6y9955707a
Estate blade, £3.80 6y0955425
Hatch cap £1.59 6y6955435
vat £2.39
total £18.35