I checked around the Internet but aint rly found an answer for this, so i got the Ultimate Weapon recipes by now and just wondered if there is any other way to get Devil, Fiend&Angel Bead's besides from that one-time-only-enemys.
Also i never paid much attention, but i think Ryumil Dragon is a normal mob somewhere so Dragon Beads are np, and about Angel Beads i hope the same, that Voice of God etc. is just in some of that lvl 90 Dungeons cuz i aint checked em out yet. So do i need to start another new game to get more of the Beads or is there a way to farm em?

http://kamidori.seiha.org/index.php?title=Materials (ctrl+f Beads)

Also this place has most info, and probably that too;
http://www44.atwiki.jp/kamidori/
Though you'll have to joggle between original and google-translated as the graphics don't work that well with the latter (ie maps and such...)