www.laptopkey.com is the site I use when I need a key. A lady named Tanya runs the customer service department and she'll take care of you if you accidentally order the wrong style key. I've been using them for about 5 years or so and never had an issue they couldn't solve.

I think the most recent one was an Alienware M14x R2 I picked up for cheap that I fixed and resold. It was missing the "END" key and had a bunch of other issues.

It's up to you what you want to do, if your keyboard isn't very dirty I would just replace the keys..

Yes totalONE take note that I said that my issue was really the metal tabs being slightly out of shape that actual caused the problem. I did go head and put the new parts in but really correcting the shape of the metal Tabs would have solve the problem. Something you might look into you now have 2 different links I think both have instructions on how to remove and replace the keys you might want to check at least one to see if that could be your issure too?