Bed safety bars

We are travelling to Spain in May and I am thinking about the sleeping arrangements. my LO is tall for his age and has outgrown a travel cot so he will potentially sleep in one of the single beds, I ordered some portable bed guards/rail so that he doesn’t fall out for here in the uk when we go away but I’m wondering what to do for when we go to abroad, does anyone know of any suitable products that would work and that would fit in a suitcase? Thanks