Sorry to hear this Mark, instead of breaking it would it not be worth getting another STI (paid for by your mate) and swapping the mods, etc.
You spent a lot of time and money on it and would be a shame to see it broken up. Surplus parts could be sold to replace damaged mods, remap or labour costs. Just thinking you would probably have an engine , 6 speed, brembos and loads of other bits to sell.