This is a collection of 3 auras:
WA_GCD_Alt (progresstexture)
WA_CastBar_Alt (progresstexture)
WA_Cast_Duration (text)
Remove the class and specialization requirements, after importing, if you want to use this for something non-druid.
Screen Resolution is 1920x1080, and requires minor tweaking of the custom animation function. I used the code from this page, so you should reference it for any adjustments necessary: http://www.dvorakdesigns.com/guides/gaming/world-of-warcraft/attach-weakauras-to-the-mouse-cursor.html
I also created/use a custom "Ring" texture to this site that you'll need. You can find it here: https://wago.io/N1rY4Li0b#
Lastly, for the timer font: I'm using SupervillainUI, so the font in examples is derived from that.