This might cost you CJ!
Did a google on "custom transformers uk" and found this:
Malmesbury
Takes me back a bit, does this, to my real anorak days.
But why not two or more transformers? As long as you can determine the output specs you might get by with items off the shelf.
Be sure
someone will make you something up if you pay them enough and it's all automated so quick and easy.
73s, fob