BossFrames and BossUI-Elements

[FaulTier]

Hey everybody!

I'm looking for 2 addons, to manage the following:
First, I want to change the default Blizzard BossUnitframes alike to my PitBull-UnitFrames. Are there any PlugIns/Solution to get that worked?

Second, I want an addon, which shows just the BossElement for e.g. Lord Rhyolith (with his legs, hope you know what i mean) and so on. Is there one I could use?
And, in addition, which addons are hiding this frame?

Heres my UIComp for Screens (to get to know what PitBull looks like) and at the bottom there's a listing of the used addons - which is hiding this UIElemen?

Greetz, Faultier