I am re-covering the grills on my new to me 1.2TL's, and was not thrilled with the choices out there. I contacted the good folks at Magnepan and asked them if I could purchase the cloth used for the front covers of the MG20.7's and they were more than happy to do so.
This new cloth is very high quality and very transparent. It is about 1/3rd of the thickness of the stock cloth, and is much better looking. If you are thinking of changing grill cloth, this is a great alternative. Runs about 20 bucks a yard and with 6 yards needed for the big SDA's, it's not cheap, but well worth it in the end.