They are out there alright. But expect them to be expensive.
I searched for many months before I could round up F030 TOS EPROMs at a fair price.
All PCs today use 8 bit flash eproms, and very few other applications use 16 bit eproms. So they are not common, and when you find them, expensive.
Stick with the normal 8 bit EPROMs, there's plenty out there, and they are cheap.