stand alone DMX Soft Patch

One of my esteemed Chinese suppliers are offering a self contained dmx soft patch, now in the past this would have been very useful for up-shifting some lower end gear which only goes up to 128 channels, is this an original product or is there a similar unit on the market, I haven't been able to find anything.

 

Thanks for that information though I could only find the cue patch that does{more than} the job I need and is 10 times dearer than the Chinese one, which would appear to not be a rip off copy but original, so I will buy one and see.