I went to Sta-Rite Carts on 100 N. Dixie Hwy just before 441 off of 466A.
"Frank7" (Frank Re pronounced, "ray"), is a member of this site and found him to be very knowledgable. I can't really say if he has the best price for batteries, but for what he did to upgrade my cart, I thought he was very reasonable. My battery quote, included a frame conversion so I couldn't say exactly, what I paid for the batteries themselves.
Call 326-3100 for his price quote or go to website
The Battery Doctor
__________________
"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).