Is looking around for a hand-me down AC possible? I feel for you. It is, hot out, today!
I had one, in my bedroom, that got ruined, in the fall, thanks to well, a most *sarcastically* 'wonderful' ex husband. I asked my dad, if he knew of anyone, who had a spare, but to the tune of 'Home Depot has them for good prices"

I am going to search around, even those 'good prices' are a bit of a budget stretch, right now.
I have insomnia, as it is, never mind MS, and getting a good nights sleep is a must!!
Hang in there, hoping you find an AC sooner, than later