RedRyder
Save the manuals
^you could get the factory bracket if you want to mount it the OEM way, it screws into those two supports under the bumper near the top.
CO requires them . Even if I did relocate them, I have the ugly built in square mount on my bumper that still ruins the nice curve of my bumper. I absolutely hate my front license plate, it looks like a Hitler 'stache on my car. Guess it's nice for differentiating my stock accord from all the others at the grocery store.
Is there a specific(cheapest) place to get the bracket for tilted plates?
If you have it in the place OP has it, I would worry about air flow/air restriction... If I had to have it, leave it OEM and manage.