You can get the Arc Faults Online from Home Depot for about &36 each:
Homeline 20 Amp Homeline Single-Pole CAFCI Breaker - 47715 at The Home Depot
Free shipping over $250.

I would like to mention to anyone changing a Panel, before disconnecting any wires:

Take note of all wires on breakers, see which need to be on opposite phases for multicircuits.
Verify all wires on the neutral bar are white, any black ones identify with white tape.
Then verify all wires on the ground bar ar green or bare, any blacks, identify with green tape.
Then Identify all other wires that are not hot, neutral, or ground(Air conditioning control wires, travellers, smoke interconnects, etc... ).
It is Faster to Identify before removing, then to figure out later.
Some are No Brainers and need No Notes.