On my hunt for Zentangle supplies, I hit Michael's craft store. They didn't have  much. But they did of course have the Micron pens, so I bought three black ones in different thickness levels. I did manage to find a packet of card stock tiles in different colors also. Kinda like Zentangle Tiles. They are nice and thick and actually pretty nice to swirl on with the Micron pens. The cardstock square below is a very pretty pale blue with a slight shimmer to it which you can't see in the photo. It made me think of a sky, so it was calling for some stars. 

I then wandered over to Barnes and Nobles and found this nifty Cachet Earthbound Sketch book and the Joy of Zentangle book. Love it!