The CL500M is the same lathe with a Mill head sprouting from the Headstock.
I friend has one and recently it developed an oil leak. He was quoted a 6 month delivery time for spares!
Shortly, he will be fitting a shop made housing carrying a standard 65 x 40 x 10 lipseal, together with new bearings which he has sourced locally. So supply of spares for those, should not be a problem in the future.
Since the Mandrel has a flange, a four jaw chuck will be expensive if bought from Machine Mart. But it is not impossible to fit a 4 jaw. It may require three extra drillings in the flange (As mini lathes ) or a specially made adaptor backplate. This should not be beyond the capability of most owners of such a lathe.
Judged by another recent thread, opinions of these machines differ widely. To read the comments, search for CL430 or CL500M threads
Howard