Train Horn For Classic Mini

Hey guys

I own a 1982 BLMC Mini and im looking for a train horn to give people a little wake up call :smiley: but nothing too big that it cant fit in the boot of the mini, I have a stable area for the tank ect, dont have much money and they need to be shipped from US to New Zealand, so im looking at spending about $400 US but if people recommend a good horn i might go the distance

Shockers are your best bet.

someone linked me this, showed me a good place for the horns tho, but i think the tank ect is way to big haha http://www.hornblasters.com/installs/set/?chadsimportedminicoop

what shocker would sound the best? and give people a scare