I have been trying to find night-time cloth pull-ups but Etsy was the only place I found any and the seller had a 3 week wait so I am reluctantly going to go with disposable pull-ups I think, as I hopeful DD is nearly there with night training
Babykind http://www.babykind.co.uk/pottytraining.htm also do a good range of training pants, including night-time ones. I used them a lot when my lo was in nappies and they provide a great service