Help to get BIOS for ML370 G5

Hello,

I m not a pro, I am just a Linux enthusiast, I got a ml370 g5 from "trash" , I fixed it, It's working, I just only need one fw, the bios FW SP73053.exe  at :

https://support.hpe.com/hpsc/swd/public/detail?sp4ts.oid=1121419&swItemId=MTX_dca915ac44ce497988dd648bc9&swEnvOid=4184

but when I try to get it, a pop up window ask me for license, I don't have one, I don't get why, it's an obsole product...

I am using it at home, as NAS server and DLNA server...

someone can help me or have any idea how to obtain it?