Jan 28 (Reuters) - Datasonic Group DSON.KL : * LETTER OF EXTENSION FROM KEMENTERIAN DALAM NEGERI TO UNIT * ADDITIONAL CONTRACT VALUE OF 104.8 MILLION RGT * LETTER OF EXTENSIO FOR SUPPLY OF MALAYSIAN PASSPORT CHIPS TO JABATAN IMIGRESEN MALAYSIA Further company coverage: DSON.KL ((Reuters.Briefs@thomsonreuters.com;))