Can't you just use Find and Replace? To find and replace symbols, search for a symbol by name. Replace a symbol with another symbol of any type—movie clip, button, or graphic. Select Edit > Find and Replace. Select Symbol from the For pop‑up menu. For Name, select a name from the pop‑up menu. Under Replace With, for Name select a name from the pop‑up menu. To select the next occurrence of the specified symbol on the Stage and edit it in place, select Live Edit. Note: Only the next occurrence is selected for editing, even if you select Find All in the next step. To find a symbol, do one of the following: To find the next occurrence of the specified symbol, click Find Next. To find all occurrences of the specified symbol, click Find All. To replace a symbol, do one of the following: To replace the currently selected occurrence of the specified symbol, click Replace. To replace all occurrences of the specified symbol, click Replace All.
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