get them with fink if you have it, otherwise download and compile on your own.
% ls /sw/bin/mdb*
/sw/bin/mdb-array /sw/bin/mdb-hexdump /sw/bin/mdb-schema /sw/bin/mdb-ver
/sw/bin/mdb-export /sw/bin/mdb-parsecsv /sw/bin/mdb-sql
/sw/bin/mdb-header /sw/bin/mdb-prop...
