I could be wrong as I often am but I doubt that you'll find one since it's so dependent on what type of aircraft you're flying.
Merit,
I guessing Jason is on the right track here. Even the FAA was confused on this subject when the new FAR was written. In Part 91, Amendment 91-173, adopted December 30, 1980, they said: "Commenters suggest, and the FAA agrees, that a
further clarification is necessary for terminology previously used in 91.117(b)(1) and proposed under [ some meaningless sections of Part 91 that don't relate to your question] regarding a normal descent to the runway."
In typical FAA fashion, they were writing FARs that didn't provide the user enough guidance to be of complete value in every case. If they put out anything for Part 91 after that, and perhaps they did, I didn't notice, probably because I was paying any attention.
I tried contacting my source (you know, someone who actually knows what he's talking about) regarding the pure Part 91 answer to your question but haven't heard back.
I did some checking from the Part 121 side and found that compliance with normal maneuvers/rate of descent requirement of the FAR is satisfied by being in conformance with stabilized approach criteria laid out by the FAA (in the FAA Air Carrier Inspector's Handbook [8400.10] ). This is likely the same stuff published in company manuals. Of course, this doesn't specifically address a pure Part 91 case, which was your question.
For any Widget Worshipers, my source is: "Up Front-4th Quarter, 1990", in "The Pat Answer" section, page 11, written by the late Pat "Mother" Malone herself...answers you can believe in.
Hope this helps.