Lawrence - You should start your own thread in this forum (Questions and Answers). A lot of people will look at the title of this thread and never even read it because they know they can't help.
Just start a thread called "Need Mechanical Retracts" and you should get some suggestions soon. Another good place to post is in the scale forum, but pick one or the other. Moderations usually delete duplicate threads.
Good luck in your quest.
- Paul