This is actually a good video! I wasn’t comfortable with the open flame, but you gave me a lot of insight to make up for what I forgot since the last time I did this.
As the last resort, you might be able to get a piece of “all-thread Rod” with a strength of grade 5. A junkyard might be a helpful place to try to find a stud but it’s amazing that you can’t find one at an auto parts store. (Or online). If you can find out the thread size and length, then you may be able to search online that way.