Floor beds in UK

Our son is 21 months old and will not sleep in his cot anymore, we’ve never co slept up until last week, and he slept so well in our bed. ( we think he needs more space ) However, we don’t want to get into the habit of him sleeping in with us. We were thinking of getting him a floor bed but the ones I’ve seen online are going to take weeks to arrive. Does anyone have any suggestions on where to get one fast? Or a different kind of bed that works for you? Thank you!