Adam, if you can limit yourself to a few beam depths, I have some old beam gage tables I could fax you. There are couple of problems with this, however. The sections are the old sections, so you have to pick out the closest size and use the gage for it. Plus there are sections rolled now that weren't rolled back when these tables were printed. I don't know what to do for those.
P.S. My wife almost threw this book out a couple of years ago, because it was so old (1975) and raggedy. Luckily she asked.