I measured the opening in the door and the approximate angle of the mounting surface of the check strap base, I welded up an externally mounted plate and cup that fits on the door and bolted it with round head machine screws to the door. I had also broken out the remaining pieces of the broken cracked original mount. Now I have a very sturdy fix, which of course can be seen when the door is open, but no more creaking and cracking. I did this on my 2006 tundra, the same problems and door weakness of the Sienna, which my wife has and also now needs the same repair. Seems a company could commercially make this external insert and make some decent money.