Please help in finding T889UVALK8 , T889UVUCMK7 Modems

Hello all,

I have rooted Samsung Galaxy Note 2 with CWM Recovery, on 4.3 . I need to unlock this phone. Where ever I go to download these files, I end up getting virus on my computer.

I need to downgrade my UVUCMK7 modem to UVALK8 modem to unlock using the dialing procedures, and then need to put the UVUCMK7 back on it

Please point me to a thread or site where it is safe.

Thank you very much.