(Help) messed with SystemUI xt907,stock rom,4.4.2(latest firmware )

Hello Guys, I'm in little trouble...I have messed with the SystemUI .I have flashed an custom systemui file.files contain an apk and some bionary updates...after flashing zip file I was getting error "unfortunately com.systemui has stopped" that's why I have deleted systemui.apk from system apps.now I want to get back my stock systemui.because I am using my phone without any soft keys and notifications bar.plz anyone provide me suitable systemui.apk because I don't want to flash my phone.I'm waiting for suggestion and help.

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