No worries at all, that's why I didn't link them in the original post. Please feel free to delete the others too if it avoids the possibility of generating further grief for anyone.
I am happy to make stuff if there's nothing else available but if there might be at some point I am also happy to wait. I've made a couple of those open-source unbuffered interfaces in the past, because there was nothing else available, and they have worked okay for me but I know not for everyone. I haven't the skill to design a buffered one myself, and no time to learn how, so I'm more than happy to try and help support those who do.
...In fact thinking about how that type of device is attached straight to the data bus, usually with a wonky, cheap CF or CF adapter plugged into them, that might well explain why a lot of real Amiga 1200s glitch out randomly every now and then, my own included. The same software image run on WinUAE is totally stable, as is my ACA500+ since I switched to using good quality real CF cards in it.