Any idea where to find the sourcecode of the Memoize tool from the paper 'Automating Program Speedup by Deciding What to Cache' ?

[rainthree]

Any idea where to find the sourcecode of the Memoize tool from this paper?
https://www.academia.edu/71238943/Automating_Program_Speedup_by_Deciding_What_to_Cache

I find it impressive

For example, memoizing a function may require substantial modifications to the rest of the program. 
While the development of Memoize was greatly facilitated by such tightly integrated
Interlisp facilities as the Masterscope program analyzer, the Pattern Match Compiler, the structure editor, 
and the ADVISE facility, the power of Interlisp forced us to confront many problems that do not arise in 
simpler languages. As we shall see, not all of these problems yield to complete, fully automatic solutions.```