The USENIX archives have a number of them.  I've long ago forgotten which was the best.

I'd recommend that poke around Warren's site.  I also would look at the Purdue archives as a solid start.  They had the best microprocessor tools and I know there was a really good disassembler in there for the 8 bit micros at the time.  You could use them to reverse compile code and put the symbols back etc..  There was 11 and Vax tools in that mix too.   I seem to remember there was a good one from Oz - UNSW maybe?  The other place I would look would be from the Cooper Union folks circa 1980.  Those guys ported the DEC tools (Macro-11, Librarian, Linker and FTN to V6 & V7) [they also wrote a PDP-10 simulator to do it since they were all written in BLISS-10 - amazing project].   Anyway, the CU guys had some cool tools as I recall, and an disassembler might have been in that mix.

Clem