[Organizers] "Notice of Nonrenewal" of group's general liability insurance

Hartford Community Dance's insurance carrier (Markel Insurance) just notified us that they will not renew when our current policy expires Dec 1. Apparently their underwriting guidelines have changed, and we no longer meet their guidelines. I'd appreciate suggestions on carriers. I think CDSS offers access to liability insurance; I'll be talking to them shortly. Are there other carriers dance groups (probably I should stick to US groups) have used with good experience? Thanks, Rob L -- Rob Lindauer