There are many that can but it will probably cost as much or more than a whole saber with sound. Typically the parts alone run as much as a stunt saber.
I do my own. Doesn't save me any but lets me buy parts when i have funds a few at a time.
I have a sound board in my cheap Ali express saber that would work I'd just need it transferred over blus the led area swapped and maybe a recharge port added, price shouldn't matter aslong as its not extortionate
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