Dear client,
Greetings.
Aurdino mega having which controller?
Based on that we can decide, whether we can search for the similar and equivalent micro controller. I can assist you for the component selection, as I had 5 years of experience in electronic product design where I used to select the suitable electronic components for my projects. Even i had good selection knowledge on micro controller as well.
If you give the details of your aurdino mega, then we can go for further discussion.