I assume this is obvious, but maybe it isn’t.
I recently completed a proposal project for a Bredemarket client and assembled a single PDF (cover letter plus main proposal) for the client to email to its customer.
The client asked me for text for the submission email.
I simply isolated the key points from the cover letter and crafted a brief email.
One more chance to emphasize the points we made in the cover letter.
(This is just one example of proposal repurposing, of course, as anyone who has managed proposal boilerplate/standard text well understands.)
Bredemarket 