Wrt160nl, ART&NVRAM working dumps wanted

Good day, All!

First of all - forgive me for my (google) English

I have this miracle device:
(HW ver. - 1.6;S\N start with CUR06 with OpenWrt 18.06.4 r7808-ef686b7292 / LuCI openwrt-18.06 branch (git-19.170.32094-4d6d8bc))
on which the radio interface is no longer initialized, and therefore there is no WiFi

It turned out that the problem is in the damaged nvram and art flash partitions:

  1. dmesg excerpt:
[   11.029060] ath: phy0: Bad EEPROM checksum 0x0
[   11.033563] ath: phy0: Unable to initialize hardware; initialization status: -22
[   11.041022] ath9k ath9k: failed to initialize device
[   11.046059] ath9k: probe of ath9k failed with error -22
  1. /proc/mtd:
root@(none):~# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00040000 00010000 "u-boot"
mtd1: 00160000 00010000 "kernel"
mtd2: 00640000 00010000 "rootfs"
mtd3: 003f0000 00010000 "rootfs_data"
mtd4: 00010000 00010000 "nvram"
mtd5: 00010000 00010000 "art"
mtd6: 007a0000 00010000 "firmware"
  1. partitions dumps show that both of them are filled with 0FF

If I follow "How to restore ART partition", then I need working dumps. Unfortunately neither my friends nor I have working wrt160nl at hand, and therefore I can't get working dumps.

Hence my supplication : please direct me to where I can get the working dumps of the art and nvram partitions for device in subject (wrt160nl)

Thanks in advance!