I've actually been playing around with designing one, but lack the free time to do so. I have a couple of Fusion360 models set up with commercially available pa

I've actually been playing around with designing one, but lack the free time to do so. I have a couple of Fusion360 models set up with commercially available parts, but I don't have a physical prototype yet. I'm planning on setting one up this summer. I know of nothing available commercially at a reasonable price and size.