sorry for the late reply, and didn't have time to get on-line.Did you just buy a metal grill mesh and cut them to size?
Do you remember from the top of your head how thick the stock grill was?
The stock/original grills are 0.75mm thick. I did buy a metal grill and just cut them to size, used wire snips to get a rough cut and used a Dremel to make final size.
This is what I used:
https://www.amazon.com/dp/B00F3FJYSQ/ref=psdc_15709501_t4_B00F3FJWQK
and
https://www.amazon.com/CCG-Perforat..._rd_t=40701&psc=1&refRID=MX529M4J3JYNZ4ZVFNNB
Note that this grill material is thicker than the stock grill so you can't use the retaining rings to hold them in place unless you feather the edges a bit, which I didn't do since it made the grills a bit too soft on the edges to me.