OHP has a mobile & base relay in Broken Bow. You should be able to hear Durant on the base repeater on 44.7 but less likely to receive them on the link VHF frequency (154.920) due to the distance, although they are using a beam antenna. You might be able to pick up the mobile repeater VHF link, (154.695) however that is also a directional antenna pointed back towards Durant. I can pick it up occasionally at my location because it's aligned in my general direction. The mobiles transmit on 44.9.
There is no 800 mhz base equipment in SE OK presently. I've heard that is because of budget considerations and/or the terrain there is not conducive to good reception. I'm guessing the former is probably correct because the same conditions exist in your part of AR on the AWIN system.