Just bumping this up to see what is happening on the Cooler Box Design project?
And also to post up a source of Copper sheet material, whether your building a box system or cold finger, these guys can supply in the small quantity we need:
A&E Metal Merchants, their website store is:
www.aemetal.com.au
Here is a link to the copper sheet page (note that when they say 'Pack' it means a single sheet of that size.:
https://www.aemetal.com.au/Webstore/...30cm-pack.aspx
I bought some from them.