If you check out any of the major addon sites, you will more than likely find an older version, one that still functions, so it might suit your needs. If you want the most recent version, the WoW Ace Files site has the continuously updated version.
To open the configuration window for Quartz, use the following slash command:
This will open up the options interface, where you can change the cast bars to your liking. One feature I found nice was the Merge Tradeskill option, which will take multiple casts of the same tradeskill and puts them into one cast bar, with a countdown timer. I like to know how much time I have to run and grab a beer when creating what seems like a thousand bandages.