Are you a member of *any* organizations, business or otherwise?
Think about things like credit unions, etc. Are you a veteran? Not for the VA - they don't do dental for most people. If you or your wife is, just join a service group like the VFW or American Legion - many insurance companies will give you group rates.
The point is, you may be a member of a "group" that offers group insurance rates and not even know it.
I joined a credit union years ago - haven't used them for literally 10 years, but their motto is "Once a member, always a member", and I get my group rate health insurance through them. I may have $0.34 in accrued interest from the pennies I left there years ago
Good luck - it's a bitch paying individual rates.