Modest Mama,
I am not aware of any organization. Your only option would be searching in the map for pentecostal or apostolic churches, and then pick those that have websites or facebook and look at their pictures. Those that don’t then just call them and ask them about the standards.
I hope the Lord guides you to the true and shows you holiness. I hope you didn’t have pastors preaching holiness because “I say so” or because of being contrarian to other denominations, instead of preaching from the Bible with teaching and longsuffering (
2 Tim 4:2)