although i have not got the same machine as you you should be able to get at from the front but means unscrewing the panels around the machine and probably take the top off . there should be a big clip around the drum cover that you will need to take off and the rubber seal should pull off the cover and also the machine frame if there is no hole in it you should be able to get it back on and then replace the big clip . i have replaced one myself and it's not a difficult job , have a go . a good tip for you is to use some washing up liquid on the seal and your fingers and it should "plop" the seal back on