Finally managed to buy a s/h diesel tank from regional Victoria out of a 1988 diesel 4Runner. Perfect fit. Cleaned thoroughly, replaced fuel lines, installed a new battery, fired up immediately after sitting for 4 years. Happy days. Replaced all fluids, new radiator (sold a kidney to buy that item). Upgraded all brake components, steering linkages, control arms. Runs beautifully again. Next on the list...new suspension.