You could try QGnomePlatform. You'd have to build from source, but it may fit the bill.
Also see discussion on this exact topic here on KDE Invent from a few months ago. Our very own Mr. Strobl posted there as well for BoB.

    Brucehankins
    I'l be honest, I though QGnomePlatform was the GTK2 imitation thing.
    Still, from what I read on the dev tracker compiling it on my own would be a pain, since it would need to be recompiled at each KDE update

      I personally wouldn't port any packages that start with K into Budgie. But that's just me. Anyways, you'll see🙂.

        Lucien_Lachance
        This might work, but it's ignoring the palette option. Maybe after a reload it will be better.

        However, it also decided to arbitrarily override a global config (~/.config/fontconfig/font.conf) without warning, so anyone know if we are supposed to have one by default?

          brent
          Eh, sometimes Okular is better than Evince, while KcacheGrind has not GTK equivalent.
          That, and I wanted to try Konsole

            elfprince I tear them all out by hand and when its time to update some of them sneak back in. especially Kwallet which infuriates me. K packages spawn like Tribbles.

                elfprince eopkg info kdeapp. to check deps. 9 times out of 10 it's an app I tried on a whim, unknowing, and forgot to uninstall, or sometimes they are k-orphans.