Once you're set free of depending on a camera's built-in light meter, you can use any SLR or rangefinder that has full manual exposure control. So you can now take advantage of affordable, mechanical models such as the Minolta SR-T 101 or the Yashica FX-3 Super 2000.
iPhone photographers should download Lumu Photo from the App Store. The software is free, and you can use it in conjunction with your phone's camera module to take reflected light meter readings. So the iPhone not only is the camera that you always have with you, it's also the light meter too.
If you want to go a step further, you can purchase the Lumu light meter module that plugs into the headphone port, then take even more accurate incident measurements. The Lumu is very compact and can be easily carried in your pants pocket or camera bag.
The Lumu has calibrations for both digital and analog cameras. It's easy to use, super compact, and very accurate - probably far more accurate than the semi-functioning meter in your film camera.
I've written a few articles about it. Check out Lumu - Return of the Handheld Light Meter and an updated piece that explains how to use the free reflected light meter: Lumu Photo Adds Reflective Metering Mode - for Free.
Having an independent light meter is no longer the bulky accessory of the past. The phone you already have with you works great. And if you add the incident module, then you're ready for any lighting challenge... with any camera that you want to use.