A quick and dirty check only turned up numbers from 2004, where in a survey 60% of country music fans 'leaned' Republican (whatever that means). Some more recent articles implied currently much closer to 50-50 but did not have polling to back it up.
If you read about country music demographics, it does not seem unlikely that a majority still lean Republican
https://brandongaille.com/46-curious-country-music-demographics/
It means 40% are collateral damage.