A couple of options to getting the parts you need:
1) There is a bearing kit comprising the front and rear bearings plus the bearing seal, Masterpart Part No. ZN05112. You can't buy this direct from Masterpart but if you ring them on 0871 2880 534 they should be able to tell you about local stockists.
2) Order the seal, part No. 1249667005 from any Electrolux group spares stockist and go to a bearing shop for the 2 bearings which are 30 x 72 x 19mm front; 25 x 62 x 17mm rear.
You remove the rear half cabinet, detach door seal from front of cabinet, remove rear counterweight block, remove motor, detach all hoses from outer drum, remove drum pulley, detach suspension dampers from outer drum, lift suspension springs off top crossmember and lower drum onto base inside machine, lift drum out of cabinet, dismantle outer drum, drift drum shaft out of bearings and remove inner drum, drift out bearings and press / drift in new bearings. When refitting halves of outer drum you must either renew the rubber gasket or apply silicone sealer to the old gasket.