Punk Astronaut

I'm on a mission to create a custom avatar for VR Chat. I need a few custom models before I go into unity. The main thing I need is an astronaut helmet (I have a design in mind already) that will eventually be able to display different expressions/images. I will also need a smaller, and more simplified version of this helmet (essentially a cuter version). The other parts I may need are patches to put on a jacket. These should be pretty simple from something like a radiation symbol, to a word.