Sorry,no link or idea where these are made or available,(carpet cutters,)

I tried out a standard metal cutting disc also a diamond cutting disc on both 1 mm and 1.6 mm ,not a good job but in fairness to Ash I have not tried out any special alloy discs for cutting,I am a little "frightened" of disc cutting of any sort, had some close calls in spite of being very carefull over the years.

Also,I forgot the obvious,my Bosch jigsaw with an alloy cutting blade does a good job but not as good as the shears or the carpet cutter.David:)