In reply to alexcollins123:
No I don't know where you can hire any in the UK. In fact I think you will find it very difficult to hire any in the UK.
I would suggest that you do some goooogling and research hiring in the area you are going to, my experience is that you won't find it to expensive, and probably not to problematic to source.
Good luck.
Out of interest when do you need them for. I'm asking because I've got 16 sets, and at the mo I'm in the middle of Europe, next door to Switzerland. I move about a bit, so if there was a chance I'll try to help.