S6 ADB sideload compatible OTA ROM

[KevTheDev]

Hi,

I am looking for a stock Samsung Galaxy S6 ROM (UK ideally) that I can flash using "adb sideload". All ROMs I have found so far are Odin type .tar.md5 with 1 or 5 img files. I need an original signed zip file. Can anyone point me in the right direction please?

Thanks