Luigi Mansion/Ghostbusters crossover

I'm getting ready to work on a Luigi's mansion cosplay/ Luigi Ghostbusters cosplay. Next month I'll be getting a vacuum and converting it into a poltergust 3000. Anyway the one thing I have not been able to find is a good looking hat. I've seen the ones you get with the halloween costume, and ones that are a newsboy cap. If anybody knows where I can get a more accurate hat let me know. Also I'll be getting a green long sleeve shirt, overalls, and brown boots. Then I'll be getting a jumpsuit for the Ghostbusters crossover with a "Luigi" patch and a no boo patch. I've also been on the hunt for an ice clear gameboy color to make the gameboy horror. I've got a replacement screen just waiting on getting the gameboy color. I'll be adding a few more things that I won't get into detail yet, but I'll post my progress on this thread when I get the chance. However any help with finding an accurate hat would be appreciated.

I couldn't really find anything better than what you already mentioned as far as hats, but cool idea. Hope it turns out well, looking forward to seeing the progress!