Please Help me find Firmware with MODEM: I9300BOUGNB1 Keyboard 3x43x4 topic

Hi, I have my S3 with MODEM: I9300BOUGNB1 / PDA: I9300XXUGNA5. I want back my 3x4 keyboard and looking for ROM (custom or better official) as include old 3x4 keyboard, can You tell me whych one I can flash without loos my IMEI (without downgrade modem)? Thanks so much