For those with a need to use this tool with a Courier font that works for Eastern European (Polish, etc), I have finally found one that works well with PDF Include and codepage ISO8859-2.
PDF Include 3.3.3
Got the write-up and replacement pdf_inc.p here:
http://www.tv.com.pl/stepbystep/pdfinclude/ (thank you so very much, Tomasz Judycki !!)
This took care of the Helvetica and Times-Roman proportional fonts.
I then downloaded this package of ISO8859-2 fonts:
which was listed on http://www.aatseel.org/resources/fonts/windows_central.htm
I renamed the courier fonts to courier_nl2*.ttf, then ran ttf2pt1 to create the afm's.
I then loaded the appropriate courier fonts needed in the pdf via pdf_load_font to embed the font in the .pdf.
Then just used that embedded font instead of courier and it worked like a charm.
For courier normal (not bold/italic/bold-italic), the .afm is only 13kb and the .ttf is 62kb, which was acceptable.
Note that this works with PDF Include 3.3.3. I tried to use the latest version (pdfinclude-3 branch) but there was a bug (Entry 0 outside range) when I tried to use the procedure pdf_set_base14_codepage and admittedly didn't spend a lot of time trying determine what was causing it and where.