You can use any rj45 keystone you want to. The key is to make sure you have the wires similar to they way they did it.
This is a pretty standard phone install with pair 1 on pins 4/5 and pair 2 on pins 3/6. I would assume VDSL since you only need a single pair for adsl.
If you are using rj11 cable to your router you can use a rj11 jack just make sure the pairs are the same...the pin numbers are different but they are still the inner 4 pins being used.