Hi, dont know if this is the right place,but gotta start some place

Lately I've been hearing a scratching sound form my left tweeter, but I thought it was a bad recording until today when I found out that my left speaker has no tweeter, it sound like its playing from a box.

I've checked the tweeter and the crossover filter, but nothing seems to be broken? So what should I look for, and is there any replacement tweeter, how much does it cost?