[ NO OS ] Sprint Nexus S 4G CDMA

[asa2016]

I have Sprint Nexus S 4G CDMA
model : SPH-D720

and i wipe all data using TWRP :'(

i have SDK and i can push data using adb to my phone on recovery mode [TWRP]
now i need a [ROM.zip] to push it to my phone and install the OS

any link or help please