Mark Emmer kindly provided the source for SPITBOL 88 soon after we posted SPITBOL 88 in binary form, so both forms are now available:
SPITBOL 88 Binary Distribution, executable binaries, along with documentation, test and demonstration programs,
SPITBOL 88 Source Distribution, executable binaries, along with documentation, test and demonstration programs, This version also includes all source files needed to build the system.