Does anyone know where I can buy Silverfish style Batteries in Canada?

I want to get another battery for my ebike but everything I've seen online ships from China and I'm worried about getting scammed/wrong product.

The company I bought my bike from is in America and they won't ship batteries into Canada.

My battery is a silverfish style with a 4 pin connector port, a canon head charger port and it's dimensions are 390mm X 75mm X 110 mm.

It's 48v 15AH.

Any help would be appreciated.