Map an FM template to another?

[Writer]

(I sent this from the wrong account previously. Apologies if this question appears on the list twice).

Out of curiosity, is there a utility  that allows you to map the template definitions from one FM  file to another?
 
 For example, say that I had an FM file with the following paratags:
 
 Heading1
 Heading2
 Heading3
 
 And another FM file with the following paratags:
 
 ChapTitle
 Heading 1
 Heading 2
 
 Is there a utility where I could say:
 
 Change Heading1 to ChapTitle
 Change Heading2 to Heading 1
 Change Heading3 to Heading 2
 
 TIA,
 
 Nadine