Mazda CX5 Part Number

[PC80]

Hi folks. I have a question about a 2015 Mazda CX5. This is copied from the MX5 forum as it might get removed from there.

One of the front side lights has gone. I've previously been quoted £900 to replace, due to the entire headlight assembly needing to be replaced, rather than just a bulb.

Does anyone know if it's possible to replace just the bulb? Or, alternatively, how I can identify the part number so I could source one myself more cheaply.

Thanks!