Hi brookeb60, they do look gorgeous and in case the architects aren't able to advise - perhaps they were the clients own - at signarture we create bespoke artworks and could create something very similar for you.

http://www.signarture.com.au/pages/your-perfect-artwork-made-to-order

We've had the feedback before that the striking branches of this tree rather resemble a giant fan coral, and we can produce this piece smaller and square as you require, just send us a message with your preferred sizing if you'd like a quote.

signarture 'burrawang' perspex plexiglas artwork · More Info

brookeb60 - I can get the sea fans for you. email me at tess@nantucketislandinc.com and I can send you pricing and dimensions.