Leading Suppliers Globally for Diddlers

Based on the data I have, it seems there may have been a misunderstanding or miscommunication. "Diddlers" does not seem to be a recognized industry or product category. To provide accurate information, could you please provide more context or clarify the industry or product you are referring to? Once I have a clear understanding, I can provide you with a list of leading companies in that specific industry or product category.