Can anyone tell me where I can get waterproof all in one with wellies attached?

[Louandben]

I know I have seen them somewhere but cant find the website/catalogue...I need one for Cornwall over New Year after just remembering DS sat in a hole full of seawater in the harbour on 1 Jan last year, happily digging away, soaked to the skin!

muddypuddles.com/Waterproofs try muddy puddles, but not sure if they do all attached.

If you cant get one with wellies attached, make sure his trousers are tucked inside the wellies and the waterproof suit is outside the wellies and dont let him go in deeper than the wellies.