You could isntall a working version of Test A Tag on a domain that you own by configuring a reverse proxy on your webserver. Instructions are listed on this page for a few popular webservers. The navbar at the bottom of the app will be hidden automatically on the white-labeled version.
server {
listen 80;
server_name yourservername.com;
...
location / {
proxy_pass http://test-a-tag.com/;
}
}
To host on a location other than root, modify the location clause:
location /alias/ {
proxy_pass http://test-a-tag.com/;
}
<Location "/alias/">
ProxyPass "http://test-a-tag.com/"
</Location>