Mandalorian Costume Groups to Join

I love Mandalorian and want to volunteer at hospitals and fundraising events with mando gear and saw that groups like Mandalorian Mercs does that stuff. I was wondering if there were other groups I could potentially do this stuff with and also how I can get a nice suit. As fun as it sounds, I don’t have the time to build my own, so I was wondering what a good price would be, where to buy from, and what to look for. Thanks