This modified aquarium display piece was modelled by me some time ago and has sat unused in the attic. It is based on a MDF base with the groundwork built up from DAS modelling clay. Additional detailing has been done with Milliput epoxy resin.
The model is 220mm x 180mm and 140mm tall. It is for sale on e-bay with a starting price of just £9.99, for details see this link.