Mod for 2 fan holder (long PCIe boards)

I had to remove the internal fan holder to fit long PCIe boards. Before I go start working on a 3D model for a custom 2 fan holder, I was wondering if someone else had already done a similar mod.

I’m thinking of using smaller fans ( 40x20mm?) with some jig to hold them to have whatever airflow I can get for the drives and PCIe cards on that side of the case.