wcif a single bed mattress w/o pillows or sheets?

i'm trying to build a mental hospital in the sims 4 but i can't find any cc to make the bed with. im looking for a single bed mattress that doesn't have any pillows or blankets, preferably blue (like this website's accent color blue) or dark teal. bonus points if i'm able to mix-match it with cc bedframes/ i also kinda want a bedframes thats just like, a box? just a block of wood or whatever that i can put the mattress on

(also, if you find any mental hospital cc in general please link it, i can't find any of the life of me)