I order 20 from here Gaussboys Super Magnets :: Rings :: 6mm x 3.5mm x 2mm N38 Nickel Plated Neodymium Magnet - Ring they work ok in the old style button but are to thick to put 3 in new style.
I would like to revive this thread!!! I ordered these magnets (20 of them!) and used 2 in each of my SSGGTS(s) switches. They are perfect IMO and actually work better then using the magnets from the original GG brass switch, which I was doing. I have 16 left... The first 4 I used fit just fine, and there is plenty of tolerance/movement/room that I am not worried about anything with build up etc. The throw is also very nice, as is the resistance. I could only fit 2 of the original magnets in the new low profile switch, and the resistance is/was to light, where as these magnets from Gaussboys is perfect for my liking using 2 of them.
Thanks for the information!!!