Astute C2 - rear uprights. EVEN A BROKEN ONE!

I am getting desperate, and contemplating having some made in alloy, but would really need one at least to work from, even a broken one would help!! Can anybody help me here?
Thought I might just throw this out there in the hopes that somebody might have a couple of these lying around somewhere.
They are the last bits I need to complete my Astute, and the prices for the entire C trees is getting scary on eBay.
Happy for used ones or new, just don't want to sell a kidney to get them. Anybody help me out there? Cristian..