man
there is no reason to recover the firmware
you can get a copy of the orig firmware from those dvd drives here
http://www.team-modfreakz.com/" onclick="window.open(this.href);return false;
but
if you need the key from those dvd drive
that is a different story.
first i would just dump them and see what was on them.
there is a way to recover the key from the hit flash by taking the chip off the dvd drive main board and using a programmer
getting the key.
I dont know any one that will do this for you.
Its a big job and a pain in the backside.
you can just buy a new console (it would cost less)
the benq is different if you need that key
its over the console is bricked.
after it does the erase its a clean drive
there is no recover
sorry.