Check with Barlows to see what they have? I know Collins molds have less tolerance than a Do-It. Maybe Barlows could send you some sample hooks? I buy all my hooks from them just because of their hook sizing chart as I feel they have helped me. Like you I am a DIY guy but I would not take a dremel to a Collins mold. If the hooks you want do not fit call up Shawn and ask him if he can modify it.
Allen