Same here just now. I ordered the button repair kit off of Ebay and followed this Youtube link.
It worked out really well and I've now have a working remote added to the stockpile.
I was really curious to try a Harmony 890 remote as the look appealed to me so I purchased one off of EBay for a good price.
I thought I had made a purchase mistake because it didn't come with the USB cord which is different than those used by the 650 and 665 remotes. I luckily found one...