Sorry to hear of your crash, Dimitris. A cost effect way to repair it may be to turn her into a naked bike, like a V11 Sport, if you don't mind sacrificing the fairing. You will need a 7 inch Bosch headlamp (shop araound and buy a used BMW unit) and the two V11 Sport headlamp brackets
You can get pattern levers for a fraction of the cost of the originals (try Agostinis) and exhausts keep popping up on EBAY at reasonable prices.
She will be back on the road with a little effort!
Guy