Yeah, I googled and noticed that it might not be compatible and then I did read your reply which made me to conclude: it is not compatible
Bit expensive (considering how much the machine itself cost me) if you buy it from Macfixit or similar sites, shipping costs might also be very high. I can't remember when I actually needed optical drive last time, but for some reason it bothers me that I have fully working machine in good condition (for its age) and then there is one big component missing