hi ,right i think you could use the g60/1z flywheel with vr6 clutch but dont quote me on that. i know its been used on plenty of mk4 golfs and bora TDIs state side but there is draw backs to it and i am not a 100% sure if it does fit any of the mk5 golf based tdi units. i know there is a good chance that you get clutch chatter and vibration feedback from using SMF. a DMF absorbs the power pulses that the tdi motor makes, the SMF transmits the pulses directly into the transmission loading and unloading the input shaft in the transmission. Life with a SMF on a TDI means living with a neutral rattle.
i think devonmikeyboy has a smf on his audi (sorry if i am wrong, pretty sure i read it in a mag a while since) he would be the man to ask.but i think its an american kit and its quite expensive
And the sachs dmf kit is a straight swap with the luk item and it seems to take more torque than the luk to. i used to work for gsf and vw for a while and the sachs item was always a better dmf replacement and i never had any faulty units returned whereas we had a coupl of luks go faulty. i also need a clutch soon so its either sell a kidney or the sister............