Yes. Stofen makes a diffuser set for the Canon MT-24EX, and it’s one of the main ready-made options mentioned by users. Puffer-style diffusers can also be adapted to fit the MT-24EX, but they don’t clip on securely, so you’ll usually need an elastic band and they may still slip.

That said, many macro photographers still prefer DIY diffusers—not just because they’re cheaper, but because homemade designs often produce softer, more diffused light than the commercial options. Common examples include concave diffusers and vellum-paper tent diffusers.

So if you want a commercial product, a Stofen set is a valid option. If your priority is the softest possible macro lighting, DIY solutions are often considered better.