I just replaced the upper engine mounts on my GTI this week. The local shops wanted $600 for the mounts and when looking online I couldn't find any specific for the GTI. Anyway, long story short, I took an educated punt on the following FEBI mounts and it paid off. These definitely fit a 2006 Polo GTI:

FEBI number 23918

Febi 23918 Engine Mounting Right | eBay

FEBI number 27144

Febi 27144 Engine Mounting Left Rear | eBay

Total to my door was AUD280