Rob,
The last I have heard, Stanton County was using 154.2275 for sheriff. This frequency was licensed in September 2006 along with 2 other repeaters.
151.0550 - Identified as Public works and Emergency Management
154.4075 - Unidentified use.
They may also operate on these frequencies.
Prior to the use of the new VHF frequency, they were on 39.760. This frequency may still be available for use.
--Joe