I won a neat Chinese elm in a raffle yesterday.  It's kind of a funky root-over rock rooted on a lava rock.

It already has a lot of chi and kwai, and it has a lot of potential for ching and ku, so I think it's a good candidate for a cool penjing.

I would like to do a land/water pot with it, but it's big.  I would need a land side that was about 12" X 10", and I can't find anyplace that sells them that big.  Any suggestions?

Sorry, Penjai terms.

"Ching" is purity of beauty.  A tree with good ching is instantly recognized as a piece of art.

"Chi" is spirit--the tree displays an ideal, concept, emotion or image in a unique and creative way.

"Ku" is age, sort of.  It's really a mix of old, venerable components and young components, like young shoots emerging from a gnarled, old trunk.

"Kwai" is like "wow factor." 

Great trees are strong examples of Chi, Ching, Ku and Kwai.

(This is how I was taught them.  I am not well versed in eastern philosophy, and I apologize if I misrepresent any of these concepts.)

I would, but they are not the concepts I am trying for.  I am explicitly following Chinese aesthetic principles, not Japanese ones because I am trying to grow Chinese style trees.

I don't consider myself a bonsaiist; I consider myself a penzaiist.  It kind of makes me the impressionist in the Cubists' Club, but that's ok with me. 

Fair enough.

Back on topic, does anyone have a suggestion for a pot?

Yeah, actually, I think that is the way to go.