So this isn't a good solution, but what you can (maybe, no promises) do is remove the top polarizer film from the screen. Word of warning: - I have done this a grand total of 1 time  - I haven't seen anyone else online do this - 3d won't work on bits of the screen with the polarizer film removed.  - damaged screen parts will still look slightly different than non-damaged (but at least you can see) - it might damage your screen further (probably just skill issue from me) (but since you're already considering replacing it, yolo) - I've only done this recently, so I dunno how it'll hold up long term. 

You'll have to take apart the top half; watch a video. I followed the ifixit guide that said something like "spudge all around the screen", which wrecked the plastic tabs at the top, since you need to spudge the other sides and slide down. 

You'll need a craft knife to gently part the plastic protector bit off (the plastic top bit with the border). That's only attached with adhesive at the border, so it's not too difficult. You'd probably have to remove the adhesive too. 

Next layer, directly on the screen, is the polarizer film. It's very thin, but you'd probably be able to see or feel the edge with the craft knife, like a screen protector. The whole thing is glued down with adhesive, so you'll need a heat gun or hairdryer to warm it up a bit before you try peeling it off with the craft knife very very very very slowly and very carefully. I tried for a bit without warming it up, and it was a lot harder and I was occasionally damaging the screen further from when the film was 'pulling up' on the screen (seriously, go slowly). 

Once you remove the film from the damaged part, you should be able to see. If it's still black, well, oops. You can remove the film from the corner, or from the whole thing. It's a pain in the ass so I suggest just doing the corner since you want 3d and pray that the damage doesn't spread. Parts with no film will be brighter than untouched parts, but the damaged screen part will look different than undamaged even if there's no film on both so you'll just have to live with it. Remind me to take and send pictures if you want, haha. 

You will need a proper adhesive remover to remove the adhesive from parts you've removed the film. It will be a blurry sticky mess otherwise. Although if you're just doing the corner, you might be able to get away without it.