Locked Up Unroot

Hello All,

I was attempting to unroot a Sprint Galaxy S4, everything looked good but the Sprint boot screen just sits there and nothing happens.
I hunted for literally 2 hours to try and find a STOCK Sprint 5.0.1 android ROM with no luck. I found rooted ones and other flavors but not a working link to a real file.
I would appreciate it if someone could send me a good link to this ROM....

Thanks!