Downloads - R8BF003_RED53 - K800_R8BF003_FS_EUROPE_2_RED53 - Top Sony
Downloads - R8BF003_RED53 - K800_R8BF003_MAIN_GENERIC_WI_RED53 - Top Sony
Downloads - k800custpack - HB1-06_Gen_CDA102568_11_R8A_GENERIC_EUROPE_2 - Top Sony

You'll need Farmanager & jdflasher plugin to flash db2020 CID53.