SM-G920F Boot repair Exynos 7420 device

Hi to everyone,
i’m trying to repair a dead S6 SM-G920F with an exynos 7420 processor following the guide foun on service manual of this phone.
I’ve downloaded the software "multidownloader" and the LSI USB drivers (exynos serial driver), and the software found the serial port and can send DATA correctly.
i think if i cand send the fwbl1, bl1, bl2 and finally s-boot, to the exynos processor, i will be able to send a complete firmware with ODIN.

Can somebody tellme where can i download these files for the exynos 7420 (USB_RECOVERY_SM-G925F or USB_RECOVERY_SM-G920F zip files)?
Thanks in advance.