Options appear to be:
Send them the data
Send them a subset removing station data from some of the countries who made us pay in the normals papers of Hulme et al. (1990s) and also any number that David can remember. This should also omit some other countries like (Australia, NZ, Canada, Antarctica). Also could extract some of the sources that Anders added in (31-38 source codes in J&M 2003). Also should remove many of the early stations that we coded up in the 1980s.
Send them the raw data as is, by reconstructing it from GHCN. How could this be done? Replace all stations where the WMO ID agrees with what is in GHCN. This would be the raw data, but it would annoy them.