Axminster have some spares but as they did not do the PG they may have to order anything specific in though a lot of parts are common to other versions of the SX2. LMS and Aussie also have the spares but postage costs may be high. Amadeal are listing a couple of Sieg spares.
When I spoke to Ketan a week or so ago he was still trying to find someone to take on the spares for the Sieg machines.