Help identifying a fastener and finding a replacement
For 100013, use "threaded rod", commonly known as "all thread" and cut with a grinder or Dremel tool to size. Any hardware store will have it, but you'll probably need metric.

For 100585, I'd try "female threaded round standoffs", you can get them partially threaded so you can tighten them down. (Looking at the instructions, I don't think threadlocker is going to work) Otherwise, they make closed end standoffs with a hex head at the end.