Toddler co-sleeping any size (Morden SW20)

Hello, I was wondering if anyone one as a soft lined bed or normal bed that has legs. Id either install it without the legs or get the legs cut down so I can use it as a lower bed to co-sleep with my toddler. She wont sleep alone and moves around a lot. Only floor beds in UK size mattresses are ridiculously expensive for what they and I can make my own if had a bed with a suitable leg design that I can adjust or just assemble without the legs initially. Any size from double and onwards would be great. Thanks so much for reading.