There was a large tanker mould doing the rounds of the clubs a few years ago, after our club took one off, courtesy of Tyne Models, it was taken by a club down south. I noticed in pics' on this very forum of Wings & Wheels 2007 show, a club had done a bulk ore carrier version using the very same hull, I posted and enquiry for a club in Scotland who were keen to build a tanker but no reply was ever forthcoming.
See my post for large model for towing wing & wheels 2007, 25th November 2007