Maybe something that includes local law enforcement, local instructors, ranges, gun stores, etc.
LE rarely weighs in on this kind of thing officially, unless it's to provide very general guidelines like the one in this document:
http://alerts.si.edu/docs/DHS_ActiveShooterBook.pdf
Gun stores sometimes affiliate with, or provide trainers who provide very basic firearm instruction, but it's not common for them to be involved with providing more advanced instruction.
Local classes are more likely to be focused on things like acquiring handgun licenses, basic firearm safety, etc. I know some instructors in my area, I don't know any that provide anything like active shooter response classes.
The simple fact of the matter is that most of the classes I've found online are offered by people I find to be very full of themselves.
It's fairly common for instructors to be somewhat ego driven. After all, people are spending significant amounts of money and time to hear what they have to say and learn what they have to teach.
Also, an instructor who doesn't sound sure of himself/herself isn't going to inspire confidence in those who train with them. So some of what appears to be ego can just be self-assurance, whether natural or projected intentionally.
After all, how much of your money are you willing to pay to train under a person who doesn't seem confident and who seems to imply that there are other trainers who can teach you exactly the same things?
...I live in a rural area, so there isn't much available around here.
That's not unusual. Even living in a metropolitan area doesn't insure that quality training of the type you need will be available locally. I live in the DFW area, and will be driving to a rural area next year to take a pistol training class. The training is out there, but sometimes (maybe even most of the time) you should expect to have to go find it.
The problem is that there just doesn't seem to be enough demand for this type of training to support lots of distributed trainers and training locations.