[...], you're 100% correct about the recipe: regular Ambien in a CR liquid, so it is more affordable.
However, it is surprising to me that so few doctors will use a compounding pharmacy. If they do not trust their own abilities to make such a prescription, it kind of begs the question if they are up to being a doctor. It is not rocket science after all. 
How strongly I agree with this statement! It is among the most highly-compensated and highly-regarded professions and, silly me, I would expect it to require significant skill. The irony of their concern about drug safety... Words simply fail me.
And I further note that the "magic CR" formula (which adds $3-$4 to the price of each Sanofi-Aventis tablet) can be at least closely approximated at no cost by a pharmacist, in a flavor of your choice, from bubblegum to salmon.
I might be irritated by all this, except that my irritation receptors were burnt off years ago from overuse syndrome.
But in any case, I am pleased to have found my path forward. Hopefully, someone else may discover this thread and be spared the same expense and delays I endured.