How to raise money or have companys donate to our school band?

We need money to go on a out of state trip it's pretty expensive but we're all out of money and we're a couple grand short. We're a high school marching band in our second year and we've REALLY come a long way, like we've been winning trophies, coming in 3rd place in an ENTIRE show, and we've beat other schools that have been running for over a decade.