Maybe some have already posted this, but as I can't find any tool like this on my local e-bay and I had a spare tweezers, I though of modding it.
Most tweezers are made of foldable metal, they are cheap and can be found anywhere.
You need small pliers and small cutting pliers + sand paper :
You then need to fold the tweezers at different points to get the perfect shape, able to go in between 2 keys without scratching plastic, and able to pull off a key with no pain, the best way is to use a crap keyboard to test your tool while shaping it. You may need to cut the curved end of tweezers so it can pass throught 2 keycaps.
Last, you will need sandpaper or a metal file so that your tool has no cutting edges and won't scratch platic.
Here is the result, it took me about 10 minutes and works like a charm, even on an ALPS keyboard where keycaps are really hard to remove :
Hope this may help
If any of you knows how I can find RO-59 lube in France... found nothing yet, and can't afford to buy large quantity from U.S. with shipping fees and taxes :/ But it seems to be the best lube for switches or stabilizers. I found silicone oil made for model making mechanics on amazon, for sure it will lube, but for how long ?