Yeah I live in Southern Cali too, and exercise physio wasn't available at the 2 community colleges that I attended as well. I believe UCLA extension has an online class in exercise physio, but I'm not sure if PT programs will allow you to take an online class for one of the science pre-reqs.
I applied to 20 schools, and made sure none of them required exercise physiology. I also used PTCAS to see if I could substitute any classes for Bio II since it was not offered at the community colleges as well. Luckily, you can usually substitute many different courses for Bio II (microbio, zoology, etc.) but I don't know if you can substitute any classes for exercise physio 🙁