And there is at least one other DDG set, together with Lisa Marie (none of those 8 Lisa Maries already mentioned on indexxx.com). The set is from 2002, see www.imagebam.com/image/b6541d72843067
Of course these digitaldesire sets are only republished versions. For instance the 2010-07-23 set has been shot in the year 2000, 2008-10-31 not later than 2001, 2010-05-26 and 2010-07-05 not later than 2005.
All models are at least 18 years old.