You can find several online diploma programs in Mechanical Engineering offered by various institutions. Here are a few options to consider:

1. Coursera: Offers courses in partnership with universities, covering topics like mechanical design, thermodynamics, and robotics. You can look for specialized certificates or even full diploma courses.

2. edX: Similar to Coursera, edX provides access to mechanical engineering courses from top universities. Some programs might offer a pathway to a diploma or certification.

3. Open University: Offers flexible learning options, including diploma courses in engineering that can be studied online.

4. Skillshare or Udemy: These platforms have various short courses focusing on specific mechanical engineering skills, which can be beneficial if you're looking for practical knowledge.

5. Local Technical Institutes: Check if any technical institutes in your area offer online diploma programs, as many have adapted to online learning.

Make sure to verify the accreditation of the course and institution you choose to ensure the program meets your career goals.

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