Frio County doesn't appear to have a genealogical nor a historical society (at least not on the Internet). IF you're still looking for this obit, you can contact the Dilley Public Library or the Pearsall Public Library and ask if they can make a copy of it.
Another option is to contact your local public library and ask them to find the Frio County newspaper on microfilm for the applicable time frame via inter-library transfer. Then you can view and print the obit. Successful Searching!