Thanks to the skills / generosity of your EXCELLENT Forum members (and some searching around), I found the files I needed at:
http://rapidshare.de/users/1VXNG
Needless to say they worked perfect, and my X50V brick is now the amazing tool it was before!!
I am sure it is a 'sensitive topic' and Dell doesn't want to admit / expose AXIM architectural details, but these files / this recovery technique could probably save Dell THOUSANDS in RMA / postage / technical support !!
I trust their own staff monitor this site and its Forums !!
Thanks again,
Roger:)