Sorry for the delay in replying - been away for a while.
I can't remember exactly how long the roll was, but it was 40-50mm wide and cost about $30 from Bunnings - that should narrow it down. I would guess the foam tape was about 10m, but only $5-10.
Just another question for anyone who has removed their rear parcel shelf.... how do you unclip the shelf from the rear wiper motor? I was pulling pretty hard but stopped cos I didn't want to damage anything
it took me a while to figure why my rear interior quarter panels were making so much noise, it was the seatbelt clips vibrating against the panels! i always have the seatbelts clipped in now