Normally I'd point you towards most any N95-rated disposable respirator mask, but at the moment all such masks are supposed to go exclusively to medical professionals on the "front line" of fighting the coronavirus.
Though there may be other types of such masks that still effectively filter out strong smells. Though they're all quite obvious visually. Nothing subtle about them. Yet at the moment no one is wearing a mask for fashion reasons either.
Here's such a link at least to let you know what's out there. Though presently it's probably somewhere between difficult and impossible to obtain one rated as an N95 mask or otherwise.
What is the Best Respirator For Terrible Smells?
You might also look for
carbon filtration filters that you can place inside a more conventional mask. Won't be airtight or totally effective in blocking noxious smells, but it might help. Just understand that an Aspie wanting to block out really bad smells is a much taller order than simply wanting to protect one's self from the coronavirus.
It all comes down to your own individual sense of smell. Where there are no guarantees that there is some perfect solution to such a problem. Personally I have an extreme sense of smell, that more often than not makes life miserable at times.
https://www.amazon.com/Activated-Br...carbon+filter+face+mask&qid=1587488726&sr=8-6