Sounds like one of those situations where things might have been unavoidable..

You own your car outright, or you just didn't have the required coverage?

Sux either way. Bad juju.

Have you considered a junkyard search for the yards in your area? You never know. They may know where a salvage G is that was rear-ended/T-boned. You could find all the remaining components you need in one spot.

Good luck with the rebuild, and like Blue Dream said - let us know how this rebuild goes. It sounds like a PITA.