Have you tried an Aluminium supplier? Try the yallow pages for a local stockist. But may not be anodised, you would probably have to get this done yourself or maybe the Al supplier can get it done.
dickh
I'd rather be sailing... /forums/images/icons/smile.gif
Southern Spars at Shamrock Quay, Southampton will make one for you in a couple of days. They made one for me last lear which was about that size and I think it cost me about £300, but that is dependent on end fittings etc.