I made some cups I 3D printed out of ABS, and then glued into the lower grill; I got some Toyota truck generic fog lamp housings that slip in from the back and use a yellow LED bulb. I did this project mostly as an homage to older rally cars, but they work pretty well too! Up close it looks factory, and doesn't block the flow.
This is exactly the route I'm going. I'll be going with hella 500ff and positioning them further out to each side, but that's the visual I've been looking for. Looks good!