which cells can I use to rebuild my pack?

The cases will not fit in your car so you'll need to dismantle the pack and harvest the modules.
You can swap entire set of cells.
Do not mix your pack modules with the other pack.
Choose any pack with the same (or more) modules than yours.

I don't think there is a sticky like you mention but perhaps you could add your notes to this thread so as to help others?

 

IIRC, it's different. Stay away from other Toyota hybrid models: camry, prius c, lexus, etc as they can have different type modules or count. Easy rule of thumb is to stick with other prius liftback packs. Also, I've noticed some LiOn packs getting included in search results so be aware of that; def. can't use those.

 

Gen 4 modules will work as long as it's the NiMH model battery, NOT the LiON. The Gen 4 NiMH has 28 modules.

All Gen 3 Prii have 28 modules. The Prius C has only 20.

I haven't seen a Lexus with less than 28, but if they have an equivalent to the Prius C, I would investigate further.

Camry's and Altimas and many Lexus have 34 modules. If you can find a late model Lexus with 34 modules, at the same price, that would be the way to go. Use 28 and sell the rest.

Buy the newest battery offered.

Look at the serial numbers on the top of the modules to ensure you're not buying something that someone has already gutted and put old modules back in for a core return. The first 2 digits are the day of the month. The third digit is the month (1-9, x, y, z) and the fourth digit is the year code. L=2010, P=2014 and so on

 

The following is taken mainly from 2016 - 2018 USA brochures.

The models of recent hybrids that have NiMH battery modules and should work are:
3rd Gen Prius
4th Gen Prius One and Two (NiMH)
Camry Hybrid LE, SE, and XLE (NiMH)

Models with Li-ion battery modules and can NOT be used are:
4th Gen Prius Two Eco - Four Touring (Li-ion)
Camry Hybrid 2018 LE (Li-ion)

I haven't checked Lexus or Altima yet.
Of course, double check at the auto wrecking yard when you go to pick it up.