I think I may be able to put in a small bulk order for nappy sprayers, if enough people want one. They are £22.95 at Babykind, which is the only place I've found them, and I think that's quite a lot.
www.babykind.co.uk/nappyessentials.htm scroll down the page and it's about 3/4 of the way down.
However, I may be able to get a trade order in, through my swimming business, but there's almost certain to be a minimum order - I'm guessing about a dozen. If anyone is interested, please email me [email protected], and if there are enough, I'll make enquiries. (It's a British firm I've found who makes them)
Again I'm guessing trade prices will be about 30% lower than retail, but don't know until I make inquiries. There would be postage from me as well, but I can ask how much they weigh, and estimate how much that would be. I'm sure it would be considerably cheaper than retail.