Where to buy atman pump parts?

[Reef-Geek]

Hi guys,

my swc skimmer's pump stopped working and it's because the needle wheel is splitting into 2 parts, I would like to buy a replacement needle wheel but cannot find it anywhere in Canada, anyone can help?

I am not too sure about the model of the pump, cause there is no labels or anything, but I believe it's either Atman 1100 or 2500.

Thanks