[John Rambo]

Hey guys
So one of the AC lines in the engine bay got cut by an aftermarket part rubbing against it (my fault), and all of the refrigerant leaked out a while back. I figured I would fix it after winter as I had other things going on and didn't really need the AC to be working.

Now that it's starting to get warmer, I am looking into fixing it.

I ordered a new line from Subaru, but doing some research online revealed that since the system has been "open" for some time, I would have to replace the receiver drier as well, and I can't simply fix it by creating a vacuum within the system via a vacuum pump and then adding the correct amount of refrigerant after replacing the line. This is because the receiver drier will have been destroyed by the moisture that is inside the system since the AC line was cut and opened.

I think on our cars the AC condenser has the receiver drier built in (tube along the side of the condenser) that said, I'm not 100% sure. My question is do I have to buy a brand new condenser for the car? I don't even know if a used one would work, considering when it was taken off the car it's receiver drier would be shot too... And how do I go about figuring out how much refrigerant oil to add? I'll probably end up taking it to a mechanic at this point but I want to know exactly what needs to be fixed so I don't get screwed over.

TL;DR AC system has been open for a while, besides fixing the leak do I need to replace any other parts like the condenser with a brand new one before recharge?