This has been resolved, because I can now see these two utilities when I boot to SARDU.
It is possible that I did not realize they were there because they were at the end of the list that was not visible on the screen, except by moving down to the end of the list. There is a rectangular box at the top right of the screen, but it is not really well recognizable as a scroll bar for indicating that there are more items off-screen, and also there is no mouse function.
However, before discovering that I could move down the list with the keyboard down-arrow to reveal more items, I had also first downloaded replacement files for these two utilities and made a replacement ISO file for each of them, and had
re-created the SARDU USB Flash Drive.
Therefore it is possible that the two items were not in the list previously.