Default [Q] Latest Bootloader Flashable link??

Hi all,

Having real troubles with my phone trying to take the CM update (status 7 error), I need a flashable bootloader and baseband, does anybody have a link to the latest version? I can only find 4.4.1

My PC is away so I have no access to fastboot at present.

I have been using CM Nightlies for some time, I have updated to the latest CWM touch 6.0.4.5 and tried TWRP 2.7, both with the same results, my research leads me to suggest the fix id an updated bootloader, the only 1 I can find is the original, but this is not flashable (no idea how to get the file (or what file actually)

Phone is a Nexus 5 KOT49H

Hope you can help
Darren

Google Nexus (Cyanogen Mod10 Nightlies)
Archos 101 G9 (Rooted-Stock)