Deepcool R-VERTICAL-GPU-BRACKET-G-1 GPU Vertical Bracket

Universal Vertical graphics card accessories; 4 slots thick capacity; VG4-4 compatible with O11 Vision O11D EVO O11D O11DXL LANCOOL III LANCOOL II

5000D is not going to work for you it only has 2 slot riser you need 4 slot for a 4090 there are a few cases that you can turn all the back

4 slot 500 series rack The Cooler Master Universal Vertical Graphics Card Holder Kit V2 has been upgraded to include a PCIe riser cable

4king slot Universal Vertical graphics card accessories; 4 slots thick capacity; Compatible with O11D EVO O11D O11DXL LANCOOL III LANCOOL II LANCOOL 215