We are a couple of weeks from having to buy TP, but the fact that it is missing from our local grocery stores (I live in Bellevue) has been making me paranoid. I should try the early morning thing and see if I can get something before its too late.
The reality is that one or two weeks from now at most most idiots will have toilet paper for months and you'll be able to buy normally again.
Goods considered non essential, however, might be scarce since those shops will close as the workers are told to stay home. For example, I'm doing a lot of studying and I'm out of sheets of paper. Office supplies stores are closed, and buying that on Amazon feels like overkill and a little socially irresponsible, so I have to make do without them.
Check your house for random silly stuff you might miss if you're stuck at home.
When I go to the supermarkets the missing things are snack foods, beer, ice cream, etc. People have a lot of time to kill and those items arent replenished as much since they're considered non essential.
However: a smaller independent market has almost always had some toilet paper, and according to our newspapers that's because their chain introduced a rule of checking ID at purchase to confirm you live in the same suburb, if they didn't already recognise you as a regular customer. I assume you've tried all options, but wanted to mention that if you've not considered smaller local indie retailers. Good luck!
It's a little harder to ration your bowel movements. It can be done, but it's a lot less beneficial than forced fasting.
Between plumbing and installation alone it's a very expensive solution to what should (under normal circumstances) be a simple purchase.
It's connecting two screw fittings, and then installing toilet seat (two bolts + nuts). If it's a particularly fancy model you may have to plug it in.
This is about as complicated as replacing a furnace air filter, and takes about as long. If you get someone to do it for you, you're paying for them to drive to your house, not the actual time installing it (which is trivial).
A cold water only bidet would save on bathroom tissue and coffee...
But most bidets that do warm water do not use a hot supply, because it takes too long to heat up. Most use a tank or tankless in the seat, and just need a normal 120v plug.
You shutoff your water, disconnect the toilet fill line, add the bidet connection in-between with a T connection, and hook your toilet back up. They share the same supply line.
And it's very cold water depending on your geographic region and time of the year. Not sure I'd want to try it in Alberta during the winter.