Empty TV Box a bit bigger than 85 x 60 x 5.5cm (East Lavant PO19)

Please does anyone have an unused, empty TV box that will take a radiator measuring 85 x 60 x 5.5 cm with enough space all round to add packing.

We have to return a malfunctioning one to the manufacturer and do not have a big enough box to put it in.

Thank you.