well the first question should be how big is the file, if its like 5gigs or some un-email’able file (which it must be if you cant upload it) you can try http://www.putfile.com/ and drop us a link.
or another route, is to save the high quality version, and shrink another copy down (if possible) just to show the basic idea. and if we choose it for print, we can then figure out how to get the high res file.
PS: thanks for talking time and helping us out.