It would certainly help your site if those links were pointed to it. The PR (Page Rank - Google's recognition of level of importance - with 10 being best) on those pages rates from 1 to 3. I doubt that the incorrect URL 'hurts' in any serious way but it would be far better to get them to use the right one.
Here's a sample email request:
Dear Webmaster at ________,
Thank you for including our company in your listings on (insert page link).
This note is to request an update of our URL to (your URL) because the one currently being displayed (old URL) is no longer in use.
We appreciate your consideration and thank you for helping consumers find us. Please let me know if you have any questions.
Sincerely,
Patti
Daisy Petal, Inc.
Your City
HTH
Here's a sample email request:
Dear Webmaster at ________,
Thank you for including our company in your listings on (insert page link).
This note is to request an update of our URL to (your URL) because the one currently being displayed (old URL) is no longer in use.
We appreciate your consideration and thank you for helping consumers find us. Please let me know if you have any questions.
Sincerely,
Patti
Daisy Petal, Inc.
Your City
HTH