They have a series of "bone" colored APC copies I've found cheap and even more durable than the real thing, Been using them on my 3D practice electrics for a few years now. They will break, but you really have to be asking for it! My point is, if the prop series you're talking about is anywhere near as nice as these are, I'd love to try them if they're available in a size I can use. When you get a minute, would you post a link please?
Here's the link to one of the props in the series I'm talking about. I highly recommend them.
https://hobbyking.com/en_us/apc-styl...___store=en_us