I'm trying to replace my power steering pump with a salvaged OEM part.

Just to be clear is the series letter found on the same plate with a bar code and what appears to be a bar code of sorts? I have attached an image of this.

I feel like I'm losing my mind.

I'm been looking at pumps on ebay that claim to be compatible with my honda civic si 99 series letter "m" but the parts i keep seeing online look different.

I was told by a honda parts person that my VIN number has four different power steering pump possibilities.

I don't want to order the wrong pump.

Does anyone on this site recommend a good sight for salvaged parts?

or have any advice on purchasing the correct power steering pump?