Andrew, You don't need a parts list - just ring the JCB help line 0845 602 1381 and explain the spares requirement. You will want to be aware that this item is no longer supported and when spares run out they are not sourcing further production.
Already, stocks of the drive assembly coil spring are exhuasted so once this fails your machine is no longer repairable (I have lost 2 already in just 2 years of use).
Mike C
December 2009