Hi toyweb,
I found this Priuschat forum post with part numbers I can’t confirm if these are correct parts the TCH but it should get you somewhat close being that the two cars are built on the same platform.
Summary: Spare Tire for 2019 Prius Prime
After some googling all the parts would cost around $500 so I kept looking and I found this eBay listing which included the spare tire, jack with crank handle, and lug nut wrench.
SPARE TIRE 17 INCH WITH JACK KIT FITS:2012 2013 2014-2018 TOYOTA PRIUS (VIN FU) | eBay However, the tools included in this listing did not fit the foam cut outs that the TCH comes with. But for $220.50 vs the nearly $500 it costs to buy each part individually from Toyota, I felt this was “close enough”. I ended up flipping the tire upside down inside the spare tire well, filling it with the tools, as well as some other tools, a first aid kit, flash light and I used a coat to kind of hold everything in place. I trimmed the bottom of the foam that came with the car in order to support the trunk load floor. The only time I really notice that stuff is loose is when I hit some very rough train tracks. The tire hold down screw is only like $10 but I think it only holds the tire face up which reduces the cargo space by having the tire face down, so I decided to forgo that for now.
VX1NG