I made one up. Mesh fabric stretched between the roll hoop. There is a carbon fibre rods sewed in at either side and attached to the hoop with velcro cable ties. And velcro along bottom that attaches to the rear carpet. Cost about £25~30 with fabric left over.
https://www.instagram.com/p/C6Ezj8UCFLe/?igsh=MW1yNDN6dzllOGZ2Mg==