Hey G spaghetti i will be there in 10 minutes from KY LOL, good luck with that silicone aye..
Go to home depot go into the lighting section by the shop lights its called lighting diffuser aka egg crate should be two types one is a whole piece of plastic without the holes a solid sheet you do not want that you want the other LOL..
Good luck
This is what it looks like but will come in a big sheet for about 10 bucks measure the size you want when you get home with it and use a pair of hand branch trimmers to cut the slots after cutting you will have sharpe edges take the clippers close them and run it up and doen the jagged edges to smooth out..


Go to home depot go into the lighting section by the shop lights its called lighting diffuser aka egg crate should be two types one is a whole piece of plastic without the holes a solid sheet you do not want that you want the other LOL..
Good luck
This is what it looks like but will come in a big sheet for about 10 bucks measure the size you want when you get home with it and use a pair of hand branch trimmers to cut the slots after cutting you will have sharpe edges take the clippers close them and run it up and doen the jagged edges to smooth out..

