On this link (maby) you can find another way to flash KDZ: http://forum.xda-developers.com/show...php?p=51612244
Yes, you must change some things to work, but this is the last chance for your device.
And I remember that i was read one similar post before few months, for L7 II, but i can't find it anymore. In that post someone describe how to resolve his bricked phone problem, with link to post where he was find solution how to succesfully flash firmware... this post you cant find in LG L3 II - 5 - 7 II section.
So, just keep trying, and please, share with us what you do. If you dont understand procedure, just ask, and maby I have (or someone else) answer.