Where in the net can i buy 2510a?

CD, DVD and (Ultra HD) Blu-ray Writers NEC / Optiarc Writer
#1

and shipes internationally.

#2

where are you from?
if your from europe, you can try here.

http://www.blankdiscshop.co.uk/acatalog/Hardware_Section__.html#a940

#3

In the U.S. try newegg.com. Just ordered one for less than $80.00.