Hi Daniel,
You would be hard-pressed to find a shop that will actually take out the time and do such a job - a lot are now just insurance sausage factories, which is sad.
However, if you supplied the parts, it is a labour intensive job, and insurance companies generally allow $80 per hour for jobs.
Expect $50-$80 per hour, and maybe 3 or 4 days work. Potentially $2000
I'm not trying to detract from Ryan's thread, but I've spoken with him about repairing it (as my family own a panel shop)
Here is a picture of the general panel structure on an AE86, and in order to do the job properly, you would un-pick them at the seams.
It is definitely repairable - however it's how much money you're willing to spend.
It's hard to quote because of so many factors.
As a guide to strip and paint a bumper, you're looking at $400-$500.
I would think you could have this car back on the road for around the $8,000 mark paying someone to repair it. I have seen it in the flesh prior to the accident and it is immaculate in every way possible. If I had the time and the money, I would've purchased it when it came up for sale and repaired it. It is a very honest and original car.
Here's the original for sale thread: