2011sublegacy2.5

Im also wondering if this memory that stores the 4 keys is a part of its own or maybe part of the ICM?

Okay so I own a 2011 Subaru legacy, second owner, I am a klutz when it comes to losing things. this time it has been my keys, I have already lost another set and the previous owner has lost the two it came with. I tried getting a new key cut/programmed to my car but it wasn't working, so the locksmith tried a different brand but still same specs type of key and that didn't work either, apparently you can only have a maximum of 4 keys programmed to a car and I'm wondering if there is any possible way other than towing my car and having Subaru service remove my ECU and wipe whatever they need to wipe in order for me to be able to program these keys to my car in turn spending close to 1200 on this service. is there anything I can do or maybe a local mechanic with a cheap new amazon ECU could do?