I have a dry sump tank which I no longer need.
It is in two halves with a bolted band to keep them together, made by Pace Products.
It is the 6.5 x 14 inch one shown here:
http://www.paceproducts.co.uk/public_html/php/products_info.php?productID=access/easyclean&parent=8
In top condition.
£285 from Merlin:
http://www.merlinmotorsport.co.uk/p3642/DRY-SUMP-TANK-EASY-CLEAN-6-1/2-DIA/product_info.html?osCsid=2017d7a4033e7232344aef5c273953f6
£150 .

ps also have the pretty aluminium anodised fittings and braided hoses for it for extra.

U2U sent