Another excellent site concerning MIS-X and MI-9 is this one:
http://www.conscript-heroes.com/index.html
In particular, kind of hidden on the site is a listing of all the MIS-X reports. Click on Articles on the page above, then follow down to MIS-X numbers. Clicking on that get you to the first of three pages here:
http://www.conscript-heroes.com/Art38-MIS-X.html
All of these MIS-X reports are available as pdf files which you can read on-line and save to your computer. Here is a link to the last report (number 2986 as of this moment, for Setser).
http://media.nara.gov/nw/305270/EE-2986.pdf
You can find any of the reports indexed by using the nara.gov link as given above, just change the "number" after the "EE-" to the number of the report you want. Reports 1 to 9 are indexed as 01 to 09.
Here is the link to report 01. (Hollingsworth)
http://media.nara.gov/nw/305270/EE-01.pdf
Here is the link to report 10. (McKee)
http://media.nara.gov/nw/305270/EE-10.pdf
I started looking through some of the reports concerning your question as to what happened next to the evaders after debriefing. Later in the war, many of them just returned to their units. Nothing further was done. Early in the war, when if the returned to their units they could have been recaptured in the same area where they had evaded, they were in fact transferred to a different theater of the war.