Thousand Oaks solar filter film was available as recently as a couple weeks ago on Amazon. It's not too hard to make a workable filter out of it.
Also, I always hesitate to say this, but...
I've imaged the Sun using a 10 stop filter - when shooting the International Space Station solar transits. However, you must understand the risks...
VERY IMPORTANT : You risk going blind if you attempt to look through the viewfinder at the Sun, even with the 10 stop filter. Let me rephrase that. You'll probably go blind if you do so. I urge anyone attempting solar imaging to do thourough research from reputable sources when making their decisions.
I use live view to attain focus (works better and is safer if you have a tilt screen). In this scenario, you are only risking destroying your equipment if something goes wrong. The internet says your equipment will be damaged. Mine hasn't been yet.
If you are wondering why I do this, it's because solar filters cut out so much light that I can't get a good shutter speed/ISO setting for the ISS, which is traveling at 17,500 mph.
For the upcoming eclipse, I WILL be using a solar filter