I found the following pdf file on the Air Force Academy Library website:
https://usafa.insigniails.com/Library/Home
Searching for a roster of names of men in Stalag Luft III, (which is where Lund was held), I found the following pdf file.
The pdf file is a compilation of names and information taken from the book "Behind the Wire, South Compound" by Arnold Wright:
https://usafa.insigniails.com/Librar...50cc466bbf.pdf
The first two pages explain the history of the file (enlarge the page to read it). The list of men (with column headings) starts on page 3. There are 14 columns of info on each name.
If you go to page 8 (or search for Lund) you find Keith K Lund. In the column headed "Where Shot Down/Captured" it says "Sea off Cape Bon Tunisia".
This would have come from Lund himself. The library has the three? volumes of Wright's "Behind the Wire" series on Stalag Luft III but only in paper form. That's a shame as he generally had a little more info on each man than what was put in the pdf file we can see. Here are a couple of pages from Wright's book which shows a little more of what was collected on each man:
https://100thbg.com/index.php?option...article&id=179