2025 Peterbilt 579 air horn

Hi I have a 25 Peterbilt 579 aerodynamic version truck and I find the stock air horn sounds like a happy donkey and not like a proper air horn should.
It's activated through the pull handle on the left not the steering wheel and I assume the actual horn is somewhere underneath the chassis.
Can somebody recommend a good horn that does not require a separate air tank and that will be easily installed by a mechanic and sound really good