yes, the GRAVSOFT package contain such data, see ftp.gfy.ku.dk/pub/People/cct/kvh

Thanks Dr. Tscherning!

http://geodesy.curtin.edu.au/research/gravity.cfm

see also the GGMplus directory

Thanks Dr. Timár!

As for the absolute gravimetry data you can try the absolute gravity database AGrav on http://agrav.bkg.bund.de/agrav-meta/

Airborne gravity data collected in support of NOAA's Gravity for the Redefinition of the American Vertical Datum (GRAV-D) project are freely available from the project web site.

http://www.ngs.noaa.gov/GRAV-D/data_products.shtml