Here's the final prototype. The bottom cup support isn't attached to this one because this was just the last in the line of prototypes used to make all the adjustments to get the angles and sizes right. I'm also going to make a black trim piece to cover the gap to the left of the bracket, and I somehow managed to get the mounting slot off-center, which I have already fixed for the final printing. The final product will be printed in black ABS. I'll also be doing a strength test once the final ABS example has been printed. I think it will be plenty strong enough.
EDIT: After putting this in the car to check its fit, I took it back out and put it in as if it was going to hold the cupholder on the driver's side, and it is clear that with the change in the size of the cupholder itself (smaller than the original) and the change in the angle it sticks out from the console, there is plenty of room for one on the driver's side without interfering with anything. I am now printing up another prototype that will cover the entire width of the console and mount a cupholder at both sides. I'll be out of pocket until early next week, so checking it will probably have to wait. It will be printing until about midnight tonight. I may have enough time in the morning just to see how it fits though.