The Mongrel Mob are a Notorious NZ Gang that is a very big part of culture from my country. You can google them and if you know any of their fonts can you tell me please. One listed below.

My advice would be do a quick search on google of biker typefaces:

https://www.google.com/search?q=Biker+typefaces&tbm=isch&source=iu&ictx=1&fir=zFvw5qjyR67S4M%3A%2CLIFwj7lFj1BrGM%2C_&usg=AI4_-kQEDyQgJq4fwSRxRipbsIKqTPYAZg&sa=X&ved=2ahUKEwjcv-atzJjgAhUFWX0KHfibCzYQ9QEwAXoECAUQBA#imgrc=nPz8H8IY5VVGrM:

There are similar fonts there but nothing exact.

Another option would be to approach them directly - go to the Hastings, NZ area and have a chat with a few of them. 

Both Hustlers and URW wood type are close but no cigar.   

Helltown is similar too:

https://www.fontspace.com/helltown-font-f25677