My question is this: are you wanting someone to recreate the UI for you, or are you wanting to be walked through the process? The former would likely require someone who really likes the UI and would be willing to not only recreate it, but also maintain it.
Either way, here's some resources, and some tips:
I'm pretty sure
this thread here on WOWI is about this UI.
In that thread, the OP has included a copy of a tga file of that glass border, or a similar one, that should be helpful in rebuilding this UI. I don't know where it came from, or if it would be kosher for use in a published UI, so it may need to be used as a guideline/example.
There's also a
short thread on the WOW site's UI&Macro forum.
Personally, I'd say maybe try out
SX Data Bar instead of something like Titanpanel, as it (imo) fits the look of the rest of the UI a little better "out of the box". Redleg said that since the picture he posted, he'd switched to
StatBlockCore. I'm not as familiar with that one, so I'm not sure about its configuration possibilities, without checking it out.
The UI maker said his pitbull UF layout was heavily based on
CaithUI. You could probably just as easily use another unit frame addon, as no matter which you choose, it's going to take some configuration work.
AZCastBar is the mentioned cast bar.
Quartz might work just as well.
For the minimap, there are several addons that make a square minimap, and nearly all of them can be easily moved to that positioning. You can see
minimap and map addons here. My personal favorite is
PocketPlot, but
DejaMinimap looks really nice.
Redleg said that "The fonts used are most definitely not the default Blizzard fonts," but doesn't specify what they are. I doubt alternatives or matches would be too difficult to find in most addon GUIs.
He said the action bar addon was
Bartender.
ETA: You'll require a buff frame addon. I suggest looking through
this section for options. My current favorite is
PhanxBuffs. Looks like buffs are above the chat frames and debuffs are above the damage meters.
The list, as per his OP (to which I am adding links):
* Seems to be no longer maintained on this site, will have to find elsewhere.
** No longer seems to be maintained, at all, even the people who picked it up stopped maintaining.
While some of these sections with the glass will likely still require a panel addon, some of these glass bits might be obtainable just in the addon settings for each UI component, assuming you place the glass file in a shared media folder.