Here is a quick and easy helmet stand i created. I have created 2 versions. Version 1 prints the base and shaft as 1 while version 2 allows you to print parts secretly.

I have a new and better version here - [https://makerworld.com/en/models/1833449-cosplay-helmet-stand-v2#profileId-1958073](https://makerworld.com/en/models/1833449-cosplay-helmet-stand-v2#profileId-1958073)