WANTED: valves for early Philips radios

I would like to restore a Philips 2510 and a Philips 634A. The valves I need are:

• C443 or C453 or PM24A or other equivalent output valve (2 needed)
  
• E442 or equivalent RF valve (2 needed)
• E415 or equivalent

I would be grateful for any help with these valves. James