6 month old and rocking cradle?? 🤔

My baby loves to be rocked side to side, which has worn my husband and I out because we have to rock him to sleep. I want to buy a rocking cradle but all of them are up to 6 months?!! Does anyone have any recommendations for a cradle that goes beyond 6 months? (One that rocks side to side). My baby will only fall asleep being rocked!! 😴