Check with Bianchi USA to see if they have a crash replacement policy. Some bike manufacturers will sell you a replacement frame for reduced price if involved in a crash. It's worth a try.

That said, I would get a Soma Saga if you decide to get a new frame on a limited budget. For me, its geometry is much more favorable than the Surly LHT, but that is a personal fit issue. Surlys have longer top tubes and shorter head tubes than I prefer.