upload to different folders

Does anyone know of a plugin that will allow you to upload your files to different folders when you are using a multisite installation?

For instance... I have some files that I will only need for a short time so I create a /temp folder, that way one a month I just go and delete the old files in that /temp folder and it keeps my database size down and my folder clean of old unused files.

I have used relocate upload in the past and it works great but it isn't working on a multisite. It wants to default to the main upload directory. Any help is greatly appreciated.