Surgery recovery memory foam pillow set for your bed.

You can get a decent set for maybe $100 or less, you can arrange them into different configurations.

Kink. On a budget.

You can also just use them ... you know, as intended, to bedrot in luxury and proper posture.

Eh, I always fund those tacky, like some jim equipment.

I would recommend getting one of these (Chaise Longue - LC4) instead, you can get them reasonably cheap & can be used in about the same ways:

so buy one? what is stopping you?