I have a little metraphot 3 that I sometimes use. It has a selenium cell. I had another handheld meter that was banged up but still had an active cell in it. It was a simple matter to trim the selenium cell to fit and surprisingly it didn't take any fiddling to read correctly.
edit: I did a little googling around and see there is a sort of tutorial on how a guy used a selenium cell from a solar powered calculator to repair his Metraphot 3
greg
+1 for the Sekonic L208 meter with shoe mount. Most of the time I have it hanging around my neck on a lanyard for incident metering, but when I go out with certain cameras it goes in the shoe. I bought a spare battery when I got it new around ten years ago, but it's still going strong on the original. That simple needle needs very little power to work.
I was using a Sekonic L-208 for a while and switched to a Gossen Digisix. The Sekonic was great when there was adequate light, but performed poorly in low lit situations. The Gossen Digisix does much better in my experience.
The Gossen shoe mounter adapter is cheap yet overpriced - see a problem there? So I went with this from Adorama (a number of other brands are available).