Default nexus 5 rom porting over to xperia z ultra 6806 ...not Google Play edition Rom

Hello does anyone know if it can happen?
Porting over nexus 5 ROM on xperia z ultra?

Or is there a ROM already that have 4.4 nexus launcher?
Yes I switched from Android to Win Mo 6.5 HD2 I actually use my HD2 for my penny stock pick and make money. About to flash it tho.