you might want to try these ones on ebay, seem pretty legit and pretty good, and they all certified, not "Compatible".
make sure when you read the specs, it says at least Certified or has the "UL" sign in there other wise, dont buy it.
I found these ones on ebay.
just go there and put these item numbers:
1 - 300325039657 - I was considering this one since it was Flat
2 - 290327858097 - And this one as well
3 - 290342173499 - But I chose to buy this one this past week on monday, but the price was $4.98, and for some reason, 5 minutes after I bought it, the price jumped up to $12.99 and it still sits at that price until now, so I am happy that I got it for that price lol.