[Proj] Official source for some NTv2 files?

[Mikael Rittri]

Hello,
In July 2008, Richard Didier wrote about the ntf_r93.gsb file
( http://lists.maptools.org/pipermail/proj/2008-July/003590.html ).

I just wondered what would be the best way to give a web link
to this file.  I thought it had been published on the www.ign.fr web
site,
but I cannot find it there.  So maybe the file is just a semi-official 
service to the open source community?  And the canonical web link 
should go to the PROJ.4 site? 

Same question for the file Dictionaries/Spain/sped2et-2005.gsb
in the CS-Map distribution (http://trac.osgeo.org/csmap).
I cannot find it by googling for 

  "sped2et-2005.gsb" site:www.ign.es

Would the canonical link go to the CS-Map site? 

Best regards,
--
Mikael Rittri
Carmenta AB
SWEDEN
www.carmenta.com