Another piece of 3D that I`ve designed lately, cuz the speaker caps from our Volvo's are mostly toasted. Pay attention: the supports are different, left AND right, and are trapezoid shaped so keep that in mind. You have to duplicate and mirror the stl file to have them both printed (see picture).

If you are glueing them in keep the centers of the holes at 110 mm to exactly match the pins from the door.

Have fun =P