The article that I read said that 10 +13 of 77 sheriffs supported OC. Remarks from the other 44 ran from "won't be able to tell the good guys from the bad guys" to "There will be more officer-involved shootings".
You might contact Jennifer Loren, Oklahoma Impact Team - bio | email and see if she will share the list with you, giving her credit of course. Then you could establish your own list or map from which to work. Contacting these sheriffs might be a multi-person effort, but strides could be made in educating LEA and establishing a spirit of cooperation with them.