I don't know if this link will work, but another member here recently uploaded his own edits of the Indiana Jones scores.
http://forums.ffshrine.org/search.php?searchid=1214715. Shown there are just the search results for the threads he's started. If that link doesn't take you anywhere, just search for member Faleel.
I am not a big Indiana Jones fan so I cannot confirm or deny the fact that the music you're looking for even exists. I just know, it's another one of those big scores, that's gotten many expanded releases over the years but never a full complete score. I do believe they have a stronger feeling that a complete for "Kingdom of the Crystal Skull" exists, because it is a much more recent release.
Hope this helps.