I would also very much like to obtain these... or to know which other latitude CAB would be "good enough"

There are cab files for latitude 13 posted on the dell support site at :

http://support.dell.com/support/downloads/download.aspx?c=us&cs=555&l=en&s=biz&releaseid=R296903&SystemID=LAT_13&servicetag=&os=W732&osl=en&deviceid=22312&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=0&libid=36&typeid=-1&dateid=-1&formatid=-1&source=-1&fileid=445431

Please let me know if this helps.