[TUHS] Any Surviving BELLMAC-8 Development Tools?

[segaloco via TUHS]

Hello everyone, I've found myself in the exceptionally fortunate circumstance of securing ownership of a MAC-TUTOR BELLMAC-8 SBC unit.  It is still in shipment so I can't assess its operation yet, but I was wondering if anyone is aware of any surviving assemblers, linkers, etc. for this architecture?  If not, I'm prepared to roll my own based on available documentation, but figured I'd ask to see if there's anything I can start with.  From what I can tell, the main development environment was PWB, specifically the Bell System internal varieties, with the BTL edition of Release 5.0 literature describing things like m8as(1), m8cc(1), etc. as Division 452 Computer Center standard commands.

There is a bit of information here as well: http://ferretronix.com/march/sbc/mactutor/

Thanks for any tips!  Regardless of how much I can manage to do with it, I'll be sure to get some good pictures and take some notes on what I am able to figure out with the thing.  I presume the Gunkies wiki would be a good place to document that sort of thing?

- Matt G.

P.S. Pardon if this belongs on COFF, I figured since UNIX was the canonical development system and it is also a Bell Labs thing, I'd ask here first.