Looks like there is a lot of PCA and several ARP in the area. There is also an OPC and an HRC church in Bradenton (might be accessible from southern suburbs) and Kenneth Talbot's church (RPCGA) is in Lakeland, which wouldn't be far from eastern suburbs.
(Also, in the world of weird combinations, I found a church in Tampa which calls itself Reformed but is part of a Lutheran-heritage Charismatic association.)