Nigel
647-UHE1H101MPD1TD or 647-UHE1H101MPD should be fine. These are 50V. Mosuer has plenty of stock of each.
Rick,
Replacing condensers would be good. There may be resistors that should be increased in wattage. If not already done so, a good cleaning and lubrication of moving parts and set screws would be advised after all the years.
Mark
