Hello all, recently had the battery (Li-Ion A42-G73) that came with my laptop (G73S/W) of several years fail on me. Looking for a bit of help replacing it as I can't seem to find any with the same specifications, which are:

Li-Ion A42-G73
14.6V
5200mAh
75Wh

I'd like to know what exactly to look for in a replacement battery and which specs are important to keep identical. I found a couple non-official dealers on Amazon, but I'd prefer to buy an official replacement if possible. Thanks for any help.