he wont sleep unless he's got my blanket on him

Please no bashing! ive coslept with my 10 month old since the day he was born, he also sleeps in my bed for naps, he uses my blanket every time. im now trying to get him to sleep in his cot during the day and then slowly move him to his cot during the night because he wakes up and tries to get off the bed. my mahor problem is, he wont sleep with any blanket, sleeping bag, wrap or anything except for my blanket, is there anything i could use safely to get him to sleep? ive done research but the only thing i can find is to use weighted blankets but i know they are not reccomended as they can be too heavy. :(