Not really ....
I have asked and had no one step up. I did get a quote on 2M a couple of years ago but it was about twice the 1M rate and I didn't take it.
You also don't usually find smooth coverage either although some companies will now write 250,000 per pass coverage. Typically it's 1,000,000 per occurrence but with 100k per passenger limits which effectively makes it 100,000 limit unless you hit a school bus on the way to a stop or carry more than one passenger.
I know AIG will write the 250 limit and I think that's pretty important.
Just my .02.... Jenny Estes at Nationair now Aurthur Gallager is the local VAF expert.
Bill