Two suggestions:
If you´re in with bigger bucks, go for a Gossen Digisix - allthough it reminds me more of a bicycle speed-o-meter it´s a full scale lightmeter (with some bugs). Gossen offers an adapter to mount it to accessory mounts/hot shoes. I actually don´t like digital lightmeters, I need an overview on EVs with one glimpse of my eye - too much fiddling around with these digital toys.
The alternative comes from the long gone Soviet Union - a Sverdlovsk 4. I recently bought a few kits via Ebay from Kharkov, Ukraine... apparently they were new, the boxes labeled in succeeding numbers, serial numbers matching and truly looking unused. Got them for 15Dollar plus 7 bucks postage in total - not bad deal.
The Sverdlovsk is twice the size of the Digisix when used in battery mode, half the size of a box of cigarettes. It´s a CdS meter, usable in object and incident mode, covering a field of ca. 8°...
You have a viewfinder - raise it to your eye, push the button on the side and turn the wheel with your thumb until the LED starts glowing. Thats your reading... easy, no?
Designed for Rsch53, the soviet kind of PX625 mercury cells - but there is a bridge circuit installed, the meter swallows everything in a range of 3 up to 4 Volt. Plus the kit comes with an battery adapter which is filled with ordinary AA cells and mounts on the bottom of the lightmeter.
The whole thing is cheap, accurate in readings, decent in finish and small. I like mine.
Theres a actual photo of one of the kits I purchased:
http://fotos.cconin.de/kameras/zub.htm#sverdlovsk4
And on-detail information:
http://cameras.alfredklomp.com/sverdlovsk4/index.htm
If you are too lazy to judge or meter - print out my Tomsk 1d table, based on Sunny 16 and Sunny 11.
http://www.rohleder.gmxhome.de/tomsk1d.pdf
I always carry a copy in my wallet - and I know many around the world doing it, too.
Best, Roman