I've been hooked on these cute desk chair pillows I saw in Amazon. Maybe one of these could work? They average 20-35 dollars.

https://www.amazon.com/dp/B08H5PFN8Q/ref=cm_sw_r_cp_apa_glc_fabc_58TKM81CCMKZQ4DH23RW

https://www.amazon.com/dp/B08YR82DZK/ref=cm_sw_r_cp_apa_glc_fabc_P8MQF8JBBBDDJ3FAMWGR