There's a thing called a DX11: https://gunkies.org/wiki/DX11-B_System_360/370_Channel_to_PDP-11_Unibus_Int… which attaches a "selector, multiplexer or block multiplexer channel" to a UNIBUS machine, which sounds like it could support the "byte multiplexer channel"? The DX11 brochure only mentions that it can be "programmed to emulate a 2848, 2703 or 3705 control unit" - i.e. look like a peripheral to a IBM CPU; whether it could look like an INM CPU to an IBM peripheral, I don't know. (I'm too lazy to look at the documentation; it seems to be all there, though.) Getting from the UNIBUS to the -10, there were off-the-shelf boxes for; the DL10 for the KA10 and KI10 CPUs, and a DTE20 on a KL10. It all probably needed some coding, though. Noel