This is the website of the Palmach's museum. They also have an extensive
archive of fighters who died in battle -- you can probably make contact with
the archive through the main museum's contact. I also looked for a cousin
who died fighting for the Palmach, and they were very helpful.

http://www.jewishvirtuallibrary.org/jsource/Society_&;_Culture/palmachmuseum.html

Laurie Rappeport