Any idea where I could get this bracket for the factory sub box?

[Matts175]

I got a good deal on a barely used factory subwoofer, but this bracket is missing. Any idea where I could get one? I looked on the usual Mopar parts websites and they don't list it. I tried to make one, but that was a fail. Anyone maybe have an old factory sub box collecting dust in their garage?

 

[Matts175]

UPDATE: Had some spare time to kill, so gave "making one" another go. It worked perfectly.