You're probably going to have a hard time finding one because most trusted casinos have it in their Terms of Service to not allow you to use VPN to access their casinos, I wouldn't risk it if that's going to be the case because they'll lock you out a bit too late, when you finally deposited something and you will find it difficult to get it back because you've breached their Terms of Service which you've agreed upon. Maybe you can be excused with the use of VPN if you're from a country that strictly prohibits gambling or the casino doesn't have any website there, that can be understandable but other than that, it's probably not a good idea to use one. NordVPN worked well for me but I didn't use it for casino or gambling purposes.