I just found pictures of them. I’m not sure where you can buy one. I googled it and apparently many of them are custom made.
I guess you could make your own, you’d need to attach two headboards. I found this, she talks about how to design one.
They’re pretty awesome, send a pic if you decide to make one :p
Maybe go through your stuff and check what you need - then store them in boxes under your bed to make room for your baby’s stuff. Or use storage boxes and baskets to keep the baby’s things in.
I don’t know how small your room actually is so it’s kinda hard. Hope I could help a little.