Hi Jammer, for my boy we had one made in Germany :
http://www.dryfashion.de . I can't recommend it, it was suppose to be made after his measurements but was way to big. I had no choice then to use it cause we only got it 2 days before start.
The one for my girl was almost dobbelt the price and we looked for a long time to find it....
https://www.ursuit.com in Finland makes really small dry suits, and it was great. Like a really expedition model. We could have used a relieve zipper on it, but it looks like it is hard to find for kids, there wasn't one on the other one.