Amber light on led number 1 in physical drive, where can I buy the replacement

Hello

I am administrating one HP Proliant Server ML350-G5 in a small company, I see that one physical drive of the server has got an amber light on the led number 1 according the manual (http://h20565.www2.hp.com/hpsc/doc/public/display?sp4ts.oid=1121586&docId=emr_na-c00708990&docLocale=en_US). 

This is the part number of the physical drive shown in the administration console:

HP DG146ABAB4, Capacity 137GB.

And this is the spare shown in the physical drive: 432320-001

I am from Spain, and I am self-employed worker, where can I buy this replacement?

Regards.