Printing Replacement Fan Duct for Model 3DP-18-4A

I accidentally broke the fan duct in my printer so I need to print a new one. I have two questions:

  1. Is there any preferred or required material to use for this? My first guess would be PLA but I wonder about the heat.
  2. There is apparently a newer version which has only a half ring around the nozzle. Should I use the new or the old version and if the new version, where do I find the STL for it?

Paul A.