Answer:
Zen's art can be located at multiple websites.
Professionally set up, (not just threads) I believe his work can be found at Furaffinity.net.
To get to his gallery, type furaffinity.net/gallery/zen.
I believe it will take you there, I've yet to check.
His work can be found on thread sites, or sites where people upload art they've found to a categorized link.
Some sites you can check around in...
vclart.net
fchan.us
paws.ru
I hope I've helped!
:D