If Samfirmware, AndroidFirmwares.net or Samsung-Updates.com don't have it, you won't find it anywhere including here.
The chances of anyone reading this thread & who coincidentally has this file given it's been 3 yrs since this phone (and this firmware) was released given how little traffic the S2 forums see these days is virtually zero.
If I was in your situation, I'd be looking for something else to use (there are other GB stock roms still downloadable at those places).
If it's important enough to cause you grief if it's lost, back it up. No excuses
Trolling for thanks is lame
Does Samsung's auto-brightness implementation crap drive you to self-harm ? A solution !
Failure to search is the leading cause of male impotence on XDA
If you don't know how to recover if things go wrong, what are you doing flashing custom roms ?