DIY Standalone DMX recorder/player?

[twinkleclaus]

I thought I've read about some work on this, but cannot seem to locate it. I am planning on giving my Dad a couple unused D-light ACx16 units that I converted to DMX. He doesn't want to allocate his computer to running it, so I thought that maybe there exists some sort of DIY DMX recorder that I can play sequences to, then have it auto-play it out DMX to whatever is hooked up. Does something like this exist in the DIY world? I know there are a few hundred dollar DMX consoles that can do this, but that is overkill for me. I also know of the Showtime player for LOR, but it is expensive and I am looking for DMX in the DIY space.