I am afraid the thread title sums up the situation nicely: You broke that scope. To be honest, I don't think it is likely that you will be able to fix it again.
Even if, with a bit of luck, we identify the right part and you can obtain that: How do you expect to solder it? You have not yet managed to unsolder the presumably damaged part, due to its ground pad. The new part will have that ground pad too, and it will need to be soldered for good heat transfer to the PCB. There is also a good chance that you will start to lift traces and pads on the PCB, due to the heat treatment you gave it.
I would start saving for a new scope, and looking around for opportunities to buy a used one if you are on a budget.