Looks like a Midea (or Chinese Indesit clone) – try searching ‘Midea wheels’ on Connect and you should see something that will fit. There are two types of wheel – one with a ‘V’ groove with a grooved runner and the other is the normal slightly radiused wheel with the ‘cotton reel’ type side runner support wheels (as Indesit). Be careful to check as the two types are not interchangeable.