Okay I am from orlando and I visit my family every few weekends I may need a locals help here but....
On 436 between 17-92 and I-4 if you traveling towards I-4 there is a pet store on the right hand side. They have reptiles and feeders in there. I am sorry but I dont know the name of the store maybe Alice or Nate can help on this one. Also my brother gets his from a Rat farm out in Apopka. If you go to the Central FL Herp Society meeting there is a guy named Harold there and he owns the Rat farm. He also sells bags of the Harland Tenkad shredded aspen pretty cheap. I get my aspen from him in between shows.

I am about to leave to visit my mom in O-town and I will get the name of that pet store for you.

Hope that helps.