Amazon for the win

https://www.amazon.com/Sayco-Faucet-Repair-Kit/dp/B0081GLIVA

You don't need to go through the tile to rebuild that valve.

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Here's a better kit https://www.amazon.com/Shower-3-Handle-Remodeling-Chrome-39620/dp/B000DZFZWA/ref=sr_1_2?crid=D2RI14UTBG9O&keywords=Sayco+Faucet+Repair+Kit&qid=1687753992&sprefix=sayco+faucet+repair+kit%2Caps%2C557&sr=8-2