I had a very similar bump but the car hit mine behind the rear wheel on the same side, there was panel damage but it was lower behind the bumper so was just kocked back out, and I had a new bumper and rear lip painted and fitted, and an IS250 for a week, at an estimated total cost to the third party of £700
my car is a 2000 with 76k, dunno if my info helps, but I thought i'd share as a rough guide