Peter,
Your car is the same model as mine. Here is an early picture of my roof. As sambo has stated I used the Mercedes cloth. It's not that much more the main cost is to manufacture. Bow set is from Don Pilling QLD.
Trimmer was Chris O'Shea Motor Trimming 3 Edgecombe Crt Moorabbin (03) 9555 0002. All the other suggestions above are good also.
There are a few around Melbourne.
Cheers
Tony