Fruit/vegetable slings or supports

I've grown a tomato in the gh called Burlesque. It's fruiting well and the fruits are big, so big that one has fallen off because it was too heavy for its stem. Unfortunately the fallen fruit is green but in order to stop this happening with the other trusses does anyone have any ideas or experience of trying to support with slings like with melons? DIY preferable but I'm happy to buy summat