Does anyone know the name of these clips and where I would be able to get it as one is broken?
Door retainer. Door catch. Roller catch. Cabinet catch. Bunnings.
aka Cabinet Latch or Catches - see bunnings link below.
I reckon, you should probably get a magnetic one, if you want to change it, rather than an exact replacement.
Nylon gripper catch.
What brand of microwave is it?