I bought that netting at Joanne's Fabrics. It was in their "utility" cloth section, on a bolt sold by the yard. White only. I tried a lighter weight netting but it tore easily. The laundry bag netting is very durable but still lightweight. I have been using the same bags for over 3 years now!
Selm, I don't use these bags to store produce in the fridge as it would dry out. I have several plastic bin veggie keepers with lids that I use in the fridge---these are washable and reusable. I just avoid all plastic bags due to the environmental issues.