Do you know of any URL shorteners or link cloakers that tracks bandwidth info instead of clicks?

I have a website which offers members to download files but most files are in a dropbox public folder. Dropbox has a daily bandwidth limit for each public link that is shared on the public folder. Unfortunately Dropbox does not offer bandwidth tracking for each link.

Bit.ly is good but only offers tracking of clicks but not bandwidth tracking. Do you know of any workaround? Thanks