I essentially vote for "no". The reason is, unless they've specifically asked you to contact them when you've created something new (or for any other reason), you'd essentially be spamming them.

I think I'd be a bit disconcerted to receive a mail out of the blue from someone I contacted once to offer feedback. Also, I assume you posted that fic in the places you'll planning to now - if they found it in those places then, I assume they'd also do so in future. It seems a little redundant.