If nothing else at least the 5036A monitor ROM source is available in
machine readable format.
This isn't my website, but I was the one that created this source
listing by unassembling the monitor ROM and then adding all of the
comments from the monitor listing in the manual to get it as close to
100% original as I could.
http://www.decodesystems.com/5036ALST.TXT
http://www.decodesystems.com/5036ASM.TXT