Well decided to mess around in tinkercad (never used it before but I have a lot of experience with 3d modeling software so didn't take too long to figure it out). Have what I think is a halfway decent rough draft for the part I want to print based off measurements and actually holding the part up to my screen to try and figure out the angle lol (appears to be damn close to 35*).
This is essentially a front facing view of the part. Those lips will catch the back side of the bezel and that bottom piece should rest almost perfectly on top of the cup holder on one side. Sides and top are 1/4" and bottom is 3/8". Then I would just epoxy it into place and maybe add some pieces of metal for more rigidity if I think it's needed which I suspect it won't, we will see. Also I know basically nothing about 3d printing so I'm not even sure if this is a shape that will print easily lol.