From DX:
Brand N/A
Model 10050098W
Quantity 10 piece(s) per pack
Color Silver
Material NdFeB magnet
Specification Ring magnet, suction is strong, can be used in industrial production, the gadget adsorption, etc., can also be used for personal creative design. Product Size: Outer diameter 14mm, inner diameter of 9.5mm, thickness 1mm; Magnetization direction: N S pole ends of the plane; Operating temperature: Maximum 80'C;
Packing List 10 x Strong magnet rings
AFAIK we need 14mm inner diameter, i'm not sure this will work.
Edit: after Firestorm's post I finally measured my switch (I should do this before order) and with small locking/conductivity pin it is 9.9mm. Outer diameter should not be critical, parts with threading is about 18mm.