little spring lost

I just finished installing a new cd receiver in my 99 accord, but in the process, i lost the emergency signal button's little spring (next to clock), which makes the button pop back up when u push it in. So now, once i push it in, it stays in, and if i dont want emergency lights flashing forever, i have to take out the clock/signal module, and manually push the button back up...

Does anyone have an idea of where i can get that spring?? I have a Honda dealer where I live, but they might end up charging me like 10 bucks... haha. I'm gonna ask them this week, but are there any other places I can get it? Or does anyone have the size/width of the spring on them? Maybe i can get a spring of the same size at home depot or something....

Much thanks,
Gee