I have an old rebel that I was using as a spot meter for some time. It was basically just too cumbersome to carry two camera bodies around.
If you have an iPhone/iPod Touch, get this app- https://itunes.apple.com/us/app/pock...381698089?mt=8
This is a FANTASTIC tool for manual photography and it's free, which is much cheaper than buying a light meter. I use it all the time and the exposures are spot on. You might have luck with it.
If you don't have another smartphone, there is bound to be a similar(or identical) application on the android market.