Mazda 3 05 E-Brake Button
 

I just bought a mazda 3 hatchback 2005 recently and when I bought it I noticed the e-brake button was missing so it is just the plastic part showing. It is a blue aftermarket one but I was wondering if there is any place that I can get a replacement button, Are they all a standard size? Does it matter that mine is aftermarket?

Thanks! Sk8ermd