I suggest you see where she likes to lie, first. If it’s something like under the desk, or on the table, then you’d just want to fold a blanket for her.
My parents’ old cat Sassy, the one before the present one who dislikes everyone, had towels spread on flat surfaces for morning, midday, afternoon sunbeams. Dad would say, “Sassy’s going to lie on the beach now.”
The desk is not conducive to sleeping cats. There are too many looseleaf binders under there. I have a basket that I retrieved from the cleaning of one woman’s apartment, and it’s brand new. The bed I looked at this morning would be a perfect fit for it, but I just couldn’t afford to get it.
There are only two windows here, and only one gets any sun to speak of. I would like to get her one of those windowsill lounges so she could enjoy the sun while it’s on the window.
I will have to find some fleece at JoAnn’s and cut it into kitty-sized “cots” so she can lie where she wants.