There is a five-year-old post directing to http://www.tammuz.us/visio/Dell_Optiplex.vss, but that web site is gone.
This forum is really for desktop hardware questions. I'm afraid I have no idea how to help you apart from suggesting you keep searching.
Here's a Full set of Dell's New Stencils (whatever "full" means) and here's Physical Views of older Dell Products (whatever "older products" means).
Don't know if either has what you want....
Forum Member since 2004 I am not a Dell employee
Thanks for the info, Ron. It runs out that, "full" means everything but desktops. Still looking for OptiPlex shapes.
meant turns out