I find doxylamine to work better to sleep during opioid withdrawal than benadryl (which also makes my rls worse)
On the original question, if you are not trying to quit long term and just get to next rx fill, and youve already tried kratom and loperamide, the other option that comes to mind is poppy seed tea. I do this in a 2L soda jug. fill it about 60% with warm but not hot water. keep it in there for 20 minutes with intermittent vigorous shaking. You can add a bit of vinegar or alcohol to help the extraction but this makes the final product harder to stomach so keep that in mind. The opiates on the seeds should be enough to keep wd at bay. It is in my experience.
Personally, I think kratom is easier and cheaper than poppy seeds but with the seeds you get some morphine which is a full agonist so if your dependence is severe, I can see seeds working better. You may have to shop around to find the best ones, I find the real canadian superstore brand to be the best but I guess that doesn't help you in arizona.
You're probably back on your meds by now, but good to keep in mind if this ever happens again.