cover for ikea ektorp 2 seat sofa (Trinity EH5)

I'm looking for a cover for my ektorp 2 seater sofa in a dark colour - preferably blue, grey or burgundy. My current white one is not at all practical with grandchildren around & after many years, even when washed now looks grubby! Maybe someone has an unused or used spare they bought sitting in a cupboard which would be very much appreciated! THANKS!