I need the 6.20.502.5 firmware zip file for htc one m8

I searched in google but I only found the exe format
plz help!

version : 0.5
version-bootloader : 3.19.0.0000
version-baseband : 4.0.U605611@50319A
version-cpld : None
version-microp : None
version-main : 6.20.502.5
version-misc : PVT SHIP S-ON
serialno : FA45XWM06645
imei : 358718051427438
imei2 : Not Support
meid : 00000000000000
product : m8_ul_ca
platform : hTCBmsm8974
modelid : 0P6B12000
cidnum : CWS__001