Hi I'm new here so hello to everyone

I have a 03 V70 petrol 2.4 non turbo...
The problem I have is that the high pressure power steering pipe is leaking....
The part number stamped on the casting is as follows
8684305...
I am having a problem getting this part with that number either new or used....
I can however get the same part with the number 8684300....which appears to fit my model...

Has anyone out there any knowledge or experience with this?
Many thanks