all i do is crunch numbers and eat wood glue.
It looks like ABS was the recommended material on the forum that the part was posted on. Here is the forum it was posted on and here is the Thingiverse page for it. It would be the “modified” file, out of the two listed. I am not sure about how the specifications work, like measurements, but it would be meant to fit a 6.5" car speaker if that makes sense. I know just about nothing about 3D printers.
Thanks for the offer, I’ve been in contact with someone in this thread and they helped me out with it already. Very generous of both you and them. Thank you!