Help with bricked LSI 9300 16i controller 1

I was trying to delete the boot roms from my controller, and following some instructions, ran

sas3flash.efi -c 1 -o -e 7

since then, I have not been able to recover controller 1

I am stuck in a place similar to this thread:

except the solution doesn’t work for me, because none of my versions of the flash utilities seem to have a command to write nvdata back to the card ( funny enough, I AM able to dump the nvram of c0 , but I cant figure out how to write it back )

no matter what I try, I am stuck with this error when I try to flash:

mfg page 2 mismatch detected
writing current mfg page 2 settings to nvram
failed to validate mfg page 2


firmware fault occurred. fault code 2622
due to error remaining commands will not be executed 
unable to process commands 
exiting sasflash

Things I have tried:

  • using megarec3 and writing sbrempty.bin / running cleanflash before attempting to write the firmware
    this looks like its working, but reports I/O address high, not supported, so I dont think its writing

  • dumping the entire flash contents from c0, and writing back to c1 with sas3flash ( since dump seems to be the only command that has both read and write commands in sas3flash.efi

  • running above with the j2 jumper shorted

  • trying to access the card with lsiutil 1.72

  • accessing card with linux live ( lsirec )

No matter what I try I cant get past the above error - would appreciate some help.
At this point ive got a linix live, freedos, and efi shell bootable usb, and will give anything a shot
I have searched a fair amount before posting this, any help greatly appreciated.