Worn keys on backlit keyboard

I have had my XPS 13-9360 for just over a year, and already have the black worn mostly off of 8 keys. I got some stickers to put on the keys, but I have lost the functionality of my backlit keyboard. At $5 apiece for replacement keys it's not very cost effective. I have browsed ebay for possible replacements and have noticed that there are listings for replacement keyboards fairly cheap. It would be less expensive to buy a keyboard and remove and replace the keys from it, but I have doubts that the keys would be the same standard fit as OEM. Has anyone tried this with good results? I am presently searching for an OEM refurbished or used keyboard that would likely be the same fit as mine.