Buy the socket and use it.
Use a sharp small chisel or screwdriver and nibble at the opening till you can get the socket on the faucet. Don't forget to lub the stem and o-rings.
When finished, fill the space around the stem assembly with plumbers putty and reinstall the escutcheon and then wipe some DAP or POLYSEAMSEAL. Its easy to clean up. I don't like silicone calk as it is hard to clean and leaves a mess.