We are getting somewhere.
sudo fdisk -l 2020-12-27-Raspbian-SatNOGS-lite.img
Disk 2020-12-27-Raspbian-SatNOGS-lite.img: 3.5 GiB, 3758096384 bytes, 7340032 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xdfcd88e4
Device Boot Start End Sectors Size Id Type
2020-12-27-Raspbian-SatNOGS-lite.img1 8192 532479 524288 256M c W95 F
2020-12-27-Raspbian-SatNOGS-lite.img2 532480 7340031 6807552 3.2G 83 Linux
512 X 8192 = 4194304
sudo mount -o loop,rw,offset=4194304 2020-12-27-Raspbian-SatNOGS-lite.img /mnt
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/fixup4cd.dat
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/fixup4.dat
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/fixup4db.dat
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/fixup4x.dat
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/start4cd.elf
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/start4db.elf
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/start4.elf
wget https://raw.githubusercontent.com/raspberrypi/firmware/1.20210430/boot/start4x.elf
Now copy all the downloaded files to /mnt
-rwxr-xr-x 1 root root 145 Dec 27 2020 issue.txt
drwxr-xr-x 24 root root 4096 Apr 5 15:34 ..
-rwxr-xr-x 1 root root 2981160 Apr 5 15:51 start4x.elf
-rwxr-xr-x 1 root root 2228768 Apr 5 15:51 start4.elf
-rwxr-xr-x 1 root root 3722504 Apr 5 15:51 start4db.elf
-rwxr-xr-x 1 root root 793084 Apr 5 15:51 start4cd.elf
-rwxr-xr-x 1 root root 8452 Apr 5 15:51 fixup4x.dat
-rwxr-xr-x 1 root root 8454 Apr 5 15:51 fixup4db.dat
-rwxr-xr-x 1 root root 5446 Apr 5 15:51 fixup4.dat
-rwxr-xr-x 1 root root 3191 Apr 5 15:51 fixup4cd.dat
Check the files and umount the image.
Zip the image and copy it to a location that you can use to give this a try.
The new image can be download ~for a limited time~ via the following link
Please let me know if you where successful so I can remove the file, otherwise there is a chance my ISP will block my IP access due to using to much uplink bandwidth.
The file is now shared on a more permanent location.