I need help for flash firmware on HTC ONE SV.

Hi, i have a problem with a htc one sv. I have this telephone in bootloop. I have already flashed RUU but don’t work. With fastboot don’t work too because not find this telephone, and i have already bought magmabox for this job. But i have a problem: magmabox need firmware at .zip format and i don’t have and i can’t find this on web. For GPG download area i need an account, but i don’t know how to create it. Can someone help me? I need a firmware for this product. Please help me.