You can make a couple of tank rubbers out of one of these: http://www.ebay.co.uk/itm/Jacking-Jack-pad-adaptor-rubber-block-Porsche-TVR-VW-TDi-classic-car-/161161332835?hash=item2585f6c863:g:xNoAAOSwofxUlEjh You'll also need a sharp stanley knife and a thin chisel.
