https://www.amazon.com/gp/product/B07CQVBZZS/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B083G7MZPN/ref=ppx_yo_dt_b_asin_image_o02_s00?ie=UTF8&psc=1
These are the ones I used. They are plenty stiff and seem durable.
https://www.etsy.com/listing/857952267/the-mandalorian-helmet-stand?ref=related-2&frs=1
I bought the entire set but you can get just the stand. Not the cheapest but looks great on display.