I'm working on it, but it's been a slow process with many other things taking priority.
The first prototype needed improvements right away to really be useable. The second is almost done and I'm hoping to send it to @Niels B
by Thursday for feedback. Even if that only needs minor tweaks, it'll be several weeks before I have production inventory ready to sell. I wouldn't mind having a couple more people test out a final prototype before I make a production run of them. Send me a message if interested.