Does anyone know of an online tool that measures download times of Adobe Acrobat .pdfs across various types of connections? I'm hoping there's something similar to the Website download time measurement tools I've seen; I'm trying to demonstrate to the marketing types why they should not ask me to post .pdfs that "weigh" almost 5 MB. Especially since I know many of our users are on 56k dialup modems.

A tool that simply matches file size to estimated download times would work just as well, if anybody knows of anything like that. I can also use a downloadable software program if it's free or very cheap.