Buy a Holden logo key fob from Australia and swap your circuit board into it. Boom, problem solved and an upgrade! That's what I did with mine when the button fell in.
Keyfob covers on Amazon for some Buick models have the same shape as the SS keyfob but with a circle logo cutout that fits the Holden logo perfectly so won't have to worry about wearing the buttons down anymore since the cover protects them.
Keyfob covers on Amazon for some Buick models have the same shape as the SS keyfob but with a circle logo cutout that fits the Holden logo perfectly so won't have to worry about wearing the buttons down anymore since the cover protects them.