South Fl Marine Electrician

I have two issues that I would like a marine electrical vendor to address;
1) My two 50amp shore power cords (in Glendinning Cablemasters) are nearing the end of their useful life. Would like to remove and replace.
2) Recently I “consumed” all of the underwater zincs in a short amount of time (wasted in a 1.5 month period at “new” dock in Bahamas). Assuming it was dock related, however, would like Marine Electrician to verify continuity of grounding system and rule out a hot lead in bilge.

boat will be in Lauderdale for a few weeks starting 4/17

would appreciate recommendations.

thanks in advance.
Brett