I looked at the installation instructions, and it appears to me that you can wire the 3-way switch for either 2-way or 3-way use. That’s a very cheap price ($10/each including shipping) for a nice looking switch. I’m in for at least one set of two. I’m going to use them for LED and incandescent.
As for the screwless wallplates, you can get them online or (some of them) at your local big box store. I plan on using nothing but screwless wallplates in the future, but for now, I’ll settle for the crappy ones I have in the house (the cost for wall plates adds up).