I wound not buy this wedge to modify it to correct the angle of the wall. I would think the wall mounting side of the wedge would not have enough material for you to do so.
If you plan to use the door install wedge to get you a plumb surface, then put the 30 degree Wedge, that should work. My Wedge can be flipped to support right or left hand entryways. But the Mounting wall needs to be plumbed.
Another option, is I can modify my drawing to get you a custom wedge. I would need to know the angle of the wall. Where the Doorbell is located, right or left of the door, as your looking at the door from the outside. Is the Doorbell Pro Center on the Hardie Plank siding, or is there some overhang we need to deal with? If you want to go this route just click contact link under my name to Start a New Conversation. Thank You