PW debricking files need

hi, finally my usb uart came, i'm charging the kindle but every guide i see, i need 4 files, and i can get only two, i'm following this https://www.mobileread.com/forums/sh...d.php?t=180789

but this two files repository are down
kernel-kt-5.0.0.img: main kernel.
mmcblk0p1-kt-5.0.0.img: main partition.

can anyone help me please, do i need thoose files?