MR-78 programs for a DEC VT-78?

Hi, All, After years of looking, thanks to a tip from this list, I finally have a VT-78 to play with. I got a complete WPS-78 system except for the cart - CPU, RX78 floppy enclosure, and DEC-badged Diablo Hytype? II daisywheel printer and all the cables. So far, everything checks out. The CPU came with an MR-78 ROM pack on it. For those that might not know, it's an optional bolt-on firmware box that attaches to a DB25 plug and simulates a high-speed papertape reader. From reviewing the MR-78 printset (at the end of some of the electronic copies of the VT-78 printset), it appears that DEC sold it with several sets of firmware - there's at least a WPS78 load and a diagnostic firmware load, and possibly one or two more. Are there any ROM dumps of the MR-78 anywhere? In all my years of collecting PDP-8 parts and software and docs, I've never seen any, but I might as well ask. The circuit is utterly trivial to reproduce, and, of course, the size of modern ROMs would make it a no-brainer to make an uber-MR-78 with all known versions of the firmware on it, or with user-definable content as well (the code is stored as 8-bit bytes simulating a papertape stream (either BIN or RIM (have to check the "panel ROM code" to see which one) with some functionality removed (no RUBOUT, no pauses, and such)). Obviously I can dump the one I have, but it would be interesting to review the contents of the others. Thanks for any pointers on the MR-78 and its contents. -ethan