I don't know if this collection's still active after 5 years has passed, but I could always collaborate with some recent stuff as much anyways.
-The current link for Minstral_213's stages has been offline since April 2019. Thankfully however, with the magic of Wayback Machine you can still download the stages again: https://web.archive.org/web/20190226113615/http://www.geocities.jp/minstral_213/bbb.htm
-Rouga Zanma by Kamekaze: http://kamekaze.trinitymugen.net/
-Ren Idagawa by Kagetsu Yuki: https://onedrive.live.com/?id=4E02B697B0639B98!217&cid=4E02B697B0639B98 <--- It's the same link as his other characters.