PCI-E 5.0 Riser Cable for 5090 Vertical GPU Build?

My case is the Lian Li O11D Evo RGB and was hoping to vertical mount the 50 series.

I found this from Lian Li directly, but it's Gen 4 and I specifically want Gen 5 for the 50 card.

Do any of you have any recommendations that will work in my case?