I did that with my 2008 unibody Macbook Pro (yes, Macbook keyboards also sometimes broke pre-2016), which also suffered from EM209 [1] (second time, beyond Apple's free-fix period). I used heavy-duty rubber bands to both hold the screen together along the non-visible borders, and affix the wireless keyboard over the computer's. Certainly something to never ever show anyone else, but completely functional with the exception of the inability to close up the computer. Only after failing to start one day did I replace it with the 2012 non-Retina I am typing on; come to think of it, it's now exactly as old as the 2008 when it completely died, albeit in full working order. (It did need a keyboard repair. I am hard on keyboards.)
[1] https://randyzwitch.com/broken-macbook-pro-hinge-fixed-free/