Is there an unpatched banwave bypasser available?

Yes there is. Long version is that it is called an ALT account. If you play on your ALT account you cannot get banned as long as you do not affiliate your ALT with your main at all. Do not use the same email, password, or username. For example, if your username is CarCrusher91 do not make your ALT CarCrusher92. If you want an extra line of security, use a VPN. If you are on Chrome, you can use incognito mode. I think it has a built-in VPN. There are no situations or evidence of roblox ever IP banning someone. So do not worry about that. The short version is just use an ALT account.

^