10I got quotes from these guys
HPDE Insurance Program and another company I can't quite remember. I haven't actually purchased a policy yet, just getting a feel for the cost.
Have to double check to see if that rate is on a per-day or per-event basis... I'll give them a call tomorrow.
There is a 5% deductible on every claim (minimum of $1500), so for all claims under $30k your deductible is $1500 and above that it's 5% of the claim.