The one selling the rack on Ebay? It says this when clicking on the account:

"Based in United Kingdom, chiman2288 has been an eBay member since Jun 26, 2005"

I assume it is just a copy from China, but shipping cost was more reasonable than the one charged by Brombacher.

Anyway, it looks like the 24 liter Ortlieb Rack-Pack could do the trick, although it'd have to be moved a bit to the back to provide enough heel clearance.