I can't send PM from Frontend as Mainadmin - they know already about it. So only option for me is from adminarea area via modal window and I had feeling that something was wrong.
ClassMember plugin is already on list (you can see it on homepage, that blue accordion). You can download it as member here: https://www.e107sk.com/download/38/clanmembers-plugin
But I see you already found it. Weird that I didn't get notification about your comment.
I missed e107 times as game community CMS, I run on it when 2 alpha was out. But I had luck - when I looked something for my Nuke site, I had run on Untergang site when he gave all his paid plugins for free and let them for free reusing. I had downloaded everything at that time because I thought it would be easier for me to learn by compare the same plugin for phpNuke and e107.
Be aware, I am not advanced developer, I learn everything by myself.
Yes, you can hire me, this way you can get at the front of my free projects... If you decide for donation, please consider me as a friend otherwise they will charge it.