Our mission is to create open source electronics that democratize technology for as much people as possible! This is a full list of stuff we've done this year: https://www.murexrobotics.com/mrxEE. It isn't a requirement for the MATE ROV competition (I wish it was though; it would be super cool!).
Is creating bespoke parts a requirement for your robotics competition or just a part of your team's ethos?