While we're all waiting for A119 CPL filter, I fashioned a temporary one (from Mini 0903)
View attachment 25427
Shiny piece is a strong magnet (from an old hard drive) attached with a double sided tape. Doesn't allow for horizontal movement but it's not a problem for me.
Nice idea. I made mine using the same type magnet. I used a small plate with a lip at the top - sticks to magnet. Drilled a hole in the plate and mounted a square piece of film over the hole. Works great - easy to remove or mount when needed. Thanks for your idea about using a magnet!!!
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UPDATE: 15Sep2016
Decided using a plate and drilling a hole was a bad idea. Also, not everyone has access to hard drive magnets. Got a better idea, and parts from HomeDepot.
Now I'm using a small circular magnet, and a washer with one edge ground flat. Taped the filter on back of washer, and spray painted magnet and washer black. It looks great - like OEM. Also works great.
Parts are:
0.7 in. Neodymium Rare-Earth Magnet Discs (3 per Pack) cost $3.98 USD for pack of three
www dot homedepot dot com/p/MASTER-MAGNETICS-0-7-in-Neodymium-Rare-Earth-Magnet-Discs-3-per-Pack-07047HD/202526369
16 mm Zinc-Plated Metric Flat Washer cost $0.32 USD each
www dot homedepot dot com/p/16-mm-Zinc-Plated-Metric-Flat-Washer-806968/204276401
Rust-Oleum Painter's Touch 2X Model 249127 Internet #202246266 Store SKU #621138
12 oz. Flat Black General Purpose Spray Paint cost $3.87 USD
www dot homedepot dot com/p/Rust-Oleum-Painter-s-Touch-2X-12-oz-Flat-Black-General-Purpose-Spray-Paint-249127/202246266
Grind one edge of the washer flat, about 2 to 3 mm from the center hole. This centers the camera lens perfectly. Then mount a small piece of the polarizing film I mentioned earlier. The black spray paint does not stick very well to the metal washer nor magnet, so I have to be careful not to scrape the paint off.
Use 3m black 414P two sided tape (same as used to mount camera) to mount the circular magnet to the top of the A119. I put tape about 1 to 2 mm over half way mark on magnet - so it covers just over 50% of the bottom. Only a small bit of the magnet has to overhang the camera lens for the washer to stick tightly.