I always have extra because the cow somehow always ends up missing the paci lol.
Philips Avent Soothie - Green - 3-18 Months - 4pk
Just some simpe fitted sheets :) many designs!
KeaBabies 2pk Isla Fitted Crib Sheets for Boys, Girls, Baby Crib Sheet, Fits Standard Nursery Crib Mattresses (Khaki)
Pricey I know, but honestly SO worth it. You get what you pay for with a bassinet. I have 2 (one cheap, and this one). It's amazing how much better it is.
HALO BassiNest Luxe
I just buy a few simple sheets and keep them in rotation for the Halo.