One of the many websites, which host the exploit are for example
http://u.wiidb.de/ or
wiiuexploit.xyz
In case you want to self host the exploit, here you can find the files for it:
https://github.com/wiiu-env/JsTypeHax
But I see no reason doing so, as the other sites are still available and also won't go away in the foreseeable future, as they are stll the primary way in gaining initial access
It's also worth understanding, that this is just the initial exploit, which allows you to run an arbitrary payload. That payload could be a nand-dumper, the hbl or the environment loader for tiramisu or aroma.
A different exploit, which gives you an entry point to the System is FailST. It can be installed with the PayloadLoader Installer:
https://github.com/wiiu-env/PayloadLoaderInstaller/releases/tag/v0.1 To install that you first need to gain execution for example with the browser exploit one time and after installing FailST you can trigger the exploit by just launching the Health and Safty App, which is more convenient then to go through the browser. It also allows you to automatically trigger the exploit on boot, so you don't have to start the App manually, but thats optional.