i cannot speak about an autism diagnosis and if it will be helpful or not. I did do a little searching and found these results that are united states based. I realize this a global community and the site might not be as useful as your geographically relevant resources but maybe it could help. https://search.usa.gov/search?affiliate=iacc&query=resources+for+adults

I feel you. I am currently looking for a lost deodorant stick that I use every day. Luckily I had a trial size backup, Still looking … it has been three days,

I use 50+ upf/spf clothing if I will be outside for a long time. Too much sun literally makes me ill and/or gives me a rash. Other alternatives for sunscreen are a wide brimmed hat or a spf protective umbrella, a protective wrap, a spf protective hoodie or coverup. Amazon has a bunch of these items some are inexpensive but the name brands tend to be more expensive. Most outdoor outfitters like rei, Eddie Bauer, bass pro and others have sun protective clothing lines too. You may have to look specifically for spf 50+ clothing.