Maybe I missed it but I don't see what's wrong with the black bones bushing?
From experience, I can tell you that the black variants feel softer and don't get as hard over time if you don't ride them.
Love me some bones softs for a day when new, after that they're just sooooo squashy unless you crank them down.
88a Indy conicals or the [new] ACE bushings are my favs.